Wrapping food in used news paper-A practice with questionable safety issues

It may appear ridiculous for a westerner to see foods being wrapped in old news paper materials in many countries in Asia such as India, Pakistan, Malaysia etc which is the most practiced way of serving foods by most street vendors. This is due to the thriving market that exists for used news papers in these countries, as millions of copies of publications in English as well as in many local languages are printed and distributed to meet the demands of the reading public. It is amazing that in spite of the high growth of electronic communication system news papers are vividly read by most people to satisfy their hunger for news and information. By the latest count there are over two hundred and fifty major news paper publications alone in India though over 85000 publications are registered in total. In Hindi language itself there are over 156 million copies circulated daily while English papers print another 56 million copies every day. On an average each news paper copy costs about Rs 5 and monthly budget for a reader estimated at Rs 150 for one publication. Most households sell off their old news papers to "raddiwallas" who buy these papers through house to house soliciting. In general a month's paper can fetch about Rs 20 on an investment of Rs 150. Where do these papers end up?

The curiosity about this subject was aroused by a recent report from Kangar, Malaysia about a ban enforced by the local government on use of old news papers for wrapping food materials due to apprehensions about the safety of the paper wraps for food contact application. Accordingly from January 2016 no food operator is going to be allowed to use printed papers, mostly old news papers for  packing of foods and violations can attract punitary fines as high as 10 000 Ringits ( about one and a half lakh rupees) and possible imprisonment of two years. The reason cited by the authorities for taking such a strong policy decision is based on the data generated on the toxicity of chemicals present in news papers that can get migrated easily into the food packed in it. Interestingly the punishment regime was proposed for January next year after giving about 6 months time for the food operators to understand and be well informed about the health implications inherent in use of printed papers. Probably this is a wise move by a government which has the health and well being of the citizens upper most in its mind.          

In India we consume about 2.5% million tons of news print annually out of which 60% is imported. May be this is not a huge quantity amounting to just 1.8 kg annual per capita compared to 3.5 kg in Asia as a whole and against the global average of 9 kg per capita. In a country like Canada 80% of used paper is recycled whereas in our country the corresponding figure is just 26%. Packing or wrapping in old news papers and other discarded papers is very common in India and those who buy them use the same in a variety of ways. Some make paper bags for packing dry materials while others resell them to retail traders for packing the wares sold by them It is rare that such paper wastes are burned or used in land fills. With the advent of plastics, especially polyethylene and polypropylene, use of paper is increasingly being phased out by the retailers. But use of plastics is also now being frowned upon because of the dangers involved in migration of chemicals, some of them toxic, from the plastic bags to the foods carried in them and use of plastic bags with less than 40 microns thickness is banned in many places in India. This naturally shifts the focus once again on paper though reusable cloth bags are being promoted extensively. With such a dicey situation is the paper usage going to see a spurt in future? May be but the dangers involved must be carefully monitored to prevent any future catastrophe at the national level.

A curious consumer may be pardoned if he is not convinced about the non-safety of used news papers and other printed paper materials for packing foods. but scientific evidence cannot be brushed away easily. According to toxicologists familiar with hazards of printing inks which are used across the world, there are thousands of chemicals required to be used to get attractive printed products and many of them are highly toxic to human beings. Especially news papers produced using the off set -web printing use very thick consistency inks and a particular type of drying where mineral oil, solvents like methanol, benzene and toluene are used. The heavy metal Cobalt is a part of most of the drying agents. Generally mineral based printed inks are known to contain Mineral Oil Saturated Hydrocarbon (MOSH) and Mineral Oil Aromatic Hydrocarbon (MOAH) which are sources of gases generated by evaporation which can penetrate into foods packed in such papers. The FAO-WHO Alimentarius Commission has set an upper limit of 0.6 mg/kg that can be considered safe intake through food. Besides countless colorants, pigments, binders, additives, photo-initiators etc are present in high quality printing inks, some of them being highly toxic. Some of the chemicals detected in printed papers include Aryl Amines, Benzidine, 2-Naphthylamine, 4-Aminobiphenol etc implicated in cancers affecting bladder and lungs. 

What type of foods are most vulnerable to dangers due to printed paper packing? Generally dry products with low water and fat are relatively safe to be wrapped for short time while high fat products like Pakoda, Vada, Dosa, Bajji, etc are unsuitable to be packed in these papers. Similarly wet foods are also not considered suitable for news paper packing though the low strength of paper will cause disintegration after a few minutes, thus being a self limiting factor.While focus above has been mostly on used news papers, there is another equally critical area requiring attention when the safety of food packing is considered.  According to some estimates Indian generates about 15 million tons of waste papers of all types that include note books, stationery products, envelops, notices, etc and since only quarter of this gets into the recycling stream bulk of it gets used for packing house hold goods including food. What are the safety implications here? They are equally risky when it comes to food wrapping or packing. Another dimension to their safety is the danger posed by pathogenic micro organisms which contaminate the papers when stored for some time under humid conditions in unhygienic places exposing them to open air and atmospheric dust besides vectors like cockroach, insects and house hold pests all of which make their own contribution to make the old news papers a veritable source of microbes with different pathogenicity.         

V.H.POTTY
http://vhpotty.blogspot.com
http://foodtechupdates.blogspot.com 

THE "DANGEROUS" OIL-CONSUMERS' NIGHTMARE!

Who does not like a freshly fried food or a snack made by deep fat frying? Most humans have a weakness for preparations made by using high levels of oil and higher the oil content more tasty would be the product though health wise such foods many pose dangers in the long run. Interestingly foods with high moisture content, if fried at lower temperatures for a shorter time, may not contain too much adsorbed oil while dry products during frying process have a tendency to get infused with the frying oil thereby raising the oil content in the end product. Scientific basis for such an explanation is that in high moisture foods during frying the water gets evaporated high temperatures creating an internal pressure by the steam which comes out in force and oil has no chance get into the product if the residence time in the fryer is not too long. In contrast dry foods already have cavities pre-existing within their matrix where oil can get in fast and easy. This is the reason why most snack making plants deploy centrifuges to extract free oil from inside the product. 

The debate regarding the importance of fat as a calorie source in preference to carbohydrates is a never ending one but one thing that is certain is that high levels of  fat in every day diet can lead to increased body weight and eventuality to obesity. Of course if heavy physical activity is practiced every day, body fat can get burned and it is nothing but common sense to understand the basic principle of eating and its consequences. If calorie intake is more than calorie expenditure, the body has to store the excess calories through fat deposited in different parts of the body. Sadly the food manufacturing industry has discovered that most human beings cannot resist the temptation of foods containing high sugar and fat and very little control can be exercised while choosing foods. Besides psychologists are unanimous in their opinion that fat, sugar and salt are addictive food components like alcohol and tobacco.

One of the reasons for frequent visits to restaurants by people is the number of choice of tasty fried foods available which are not made at home regularly. Many kitchens in western world shun frying in their kitchen because of the mess that is created by the hot and smoky oils during frying. If fast food chains have become landmarks in developed countries, the reason is the same that their foods are palate tingling and irresistible to avoid. Even young kids ought to be brought up in a healthy eating environment but fall for the unhealthy products from the fast food joints and the processed food industry because of their easy availability and often at low prices. It is next to impossible to make them eat nutritious foods like fruits, vegetables, wholegrain foods, milk, etc in their every day diet. One of the reasons health pundits advocate reducing intake of fried foods is that most frying oils tend to cause atherosclerosis and consequently heart disease and stroke with tragic consequences over a period of time. Except some oils like that extracted from Mustard, Palm fruits and kernels, Coconuts, Peanut, Safflower, almost all others are not fry-stable causing generation of undesirable artifacts at high temperatures and repeated heating.

Frying is an interesting process in food technology where the temperature of the oil is raised to high levels around 200C for fully frying the product to get the desired texture and flavor. If the heat stability of the oil is low, temperatures as low as 165C can also be used to get a fully cooked end product. It is always the dilemma of a Chef as to what temperature he must use to prepare a product to reduce as much as possible oil uptake by the end product, considering that the market price of oils can vary enormously. Ideally every Chef would like to use an oil like Olive oil but it is not practical because of the high cost of this fancy oil. Many choose Palm Oil which is considered the cheapest oil in the global market thanks to the tremendous production in countries like Indonesia and Malaysia. Oils derived from Soybean, Rape seed, Maize germ, Sunflower seed, Safflower, Sesame and rice bran are also widely used. In some cultures Coconut oil is the preferred choice though its peculiar flavor is not liked in most countries. 

The oil used in frying process can degrade in quality, the rate spoilage being proportional to the extent of unsaturated fats present in it and the severity of the temperature deployed for frying. Common fryers like deep fryer, pan fryer, Chip fryer etc can have no control over the heating process and oils can deteriorate rapidly. To some extent these undesirable changes can be prevented by using modern equipment like Vacuum Fryers or Pressure Fryers which, of course need higher investment. The deterioration will be more severe if the oil is repeatedly heated and cooled over a period of time. Oxygen present in the air reacts with the unsaturated fatty acids creating highly reactive oxy radicals and other undesirable artifacts, some of which have been proved to be toxic. High frying temperatures can also break down fats into smaller molecules which cause many other problems like excessive foaming. Polar compounds and polymerized products of oxidation have been proved to be injurious to human health. Frying of starch containing foods is known to produce the carcinogenic artifact Acrylamide. In view of these evidences, oils are not allowed to be used repeatedly for frying and discarding them after using it in the fryer is always considered a wise policy. Many high class restaurants and snack food industry dispose off the heated oils which are supposed to end up as a waste. In reality this does not happen as oil is a high value material in great demand and used oil invariably finds new users who smell money in this "waste" !

When oil is subjected to repeated heating, it becomes dark in color, starts smoking, foaming, generates unpleasant smell, creates undesirable rancid taste, increases viscosity etc, unacceptable to the consumer. While large scale manufacturers of snack foods deploy fryers with multiple controls to regulate the temperature and the frying time, it is the unorganized sector where small scale, semi skilled and illiterate cooks make the products using their "experience" and "hunch" and who unknowingly contribute to very significant damage to the oil. Emergence of oil protectants like antioxidants, chelating agents and a variety of adsorbents of polar chemicals formed during frying prolong the life of frying oils very significantly but even here its life is not eternal, requiring replacement at regular intervals. In countries like the US or the European Union fried oils are never reused for food preparations, invariably ending up ass a biofuel. Recently there were reports that fried oil is fetching a higher price in the market than that commanded by its virgin counterpart! Fryer oil is also used extensively in power generation, household heating during the winter season as it burns clean without any significant carbon foot print and as automobile fuel with no pollution. Carbon monoxide is virtually nil when it is burned. No wonder recycling of fried oil has become a become business world over.

In India and China the recycled oil business is almost a parallel industry gnawing at the seams of the main stream edible oil industry. Of course it can be more aptly called an underground operation being carried out under the very nose of the food laws authorities and it has patrons, millions in number spread all over the country who are food artisans, vending their foods on the road side and small scale unlicensed eateries. These clients find it extremely convenient to buy the used oil supplied to them by unscrupulous processors who buy their raw material from large restaurants for reprocessing. Basically reprocessing involves filtration and decolorization in rare cases. If reports are to be believed recycled oil can be sourced at half the price of virgin oil which presently sells at around Rs 80 per liter in India! Those who use the recycled oil justify their action because oil constitutes a large chunk of the cost of the food they make and according to them if they are forced to shun these oils, they will have no alternative but to raise the prices of their preparations to levels unaffordable to most of their clients! What a justification for demolishing the population through slow poisoning!

Take the case of China where it is reported that recycled oil use is more rampant than that in India. It is a shocking revelation that one out of ten low end restaurants in China uses "Gutter Oil" for preparing their foods, a form of recycled oil which is the worse form of oil one can imagine. Most Chinese dishes are heavy in oil content and imagine the long term consequences for a population fed on such products! Gutter oil is made from discarded restaurant oils from the organized sector, drains, grease taps, slaughter house wastes, discarded animal parts, low grade animal fat. internal organs, skin portions of animals etc. The process of making it includes filtration, boiling, refining, removing adulterants and packing. As the major raw material viz, "the Fryer discarded oil" costs less than $ 900 a ton, the business is indeed fantastic as the reprocessed oil is in demand for prices beyond $ 1500 a ton! It is a mystery as to why an autocratic government like that in China where punishments can be severe and swift is allowing such criminal activities by a section of the industry which jeopardize the health of its citizens.

How can such despicable acts by the fraudulent oil trade be minimized if not curtailed in absolute terms? As some observers believe, it may be difficult to control these nefarious actors unless there is massive vigilance deploying thousands of personnel and severe punishments are given swiftly without allowing the fraud cases to linger on for years in the judiciary. On a long term basis Government will have to address the problem of critical edible oil shortage in the country during the last 3 decades on a war footing by shifting its focus from cereals to oil seeds production.     

V.H.POTTY
http://vhpotty.blogspot.com/
http://foodtechupdates.blogspot.com

MAKING RE-USABLE BAGS SAFER-A NEW APPROACH

Plastics, most of them made from by-products of fossil fuel industry is ubiquitous by its presence in practically every activity modern man is pursuing and it is very difficult to imagine a world without this synthetic marvel. Though during its early stages of popularity, not much of a problem was foreseen in expanding the use of plastics, it is now that the world is facing a crisis on two fronts in continuing with plastics without any moderation. While exhaustible fossil fuel supply and its ever escalating cost make it impossible to produce and use plastics same way as before, disposal of the used plastics poses an environmental danger of immense dimension because of their lack of bio-degradable credentials.

By far the most critical issue to day is the need to curb use of thin disposable plastic bags ( less than 40 microns thickness), used by millions of households all over the world to ferry their purchases from the market to their homes. As more and more restrictions are put in place against use of plastic shopping bags, consumers are forced to carry with them re-usable cloth bags and according to some reports these reusable cloth bags can be a dangerous source of pathogenic microorganisms as they are not cleaned regularly. Now comes the news that an enterprising entrepreneur has created a reusable carry bag made from fabric which is treated with Chitin, a by-product of Shrimp processing industry.

Chitin is the second most abundant polymer occurring naturally and though it was known that chitin is a component of cell wall of fungi, exoskeletons of anthropoids such as crustaceans including crabs, lobsters and shrimps, its industrial importance emerged only during the last 3-4 decades. Like cellulose which is a polymer of glucose, chitin is a polymer of N-acetylglucosamine with structure similar to cellulose while functionally it resembles more like the protein keratin. The deacetylated product from chitin, achieved through reaction with sodium hydroxide has found several uses in food, pharmaceutical, medical and other industries. Establishment of shrimp processing industry has opened up an avenue for profitable commercial extraction of chitin from the inedible parts of the crustacean and both chitin and chitosan are globally traded industrial chemicals.

Use of chitin/chitosan as a thickener and stabilizer is common in foods and pharmaceuticals. It also finds use as a binder in dyes, fabrics and adhesives. Besides these bio-degradable substances also find extensive use as plant protectants in agriculture and in fertilizers. As chitosan is water soluble, surgical sutures made from it are preferred by the medical industry, avoiding the need for post surgical procedure to remove sutures. Though many people are allergic to shell fish and crustaceans, chitin extracted from them do not possess the proteins responsible for the allergy. Chitosan at levels of 50-200 ppm has significant antimicrobial activity which has been made use of for making reusable fabric bags into which the material is woven.

According to scientific findings chitosan can be effective against microorganisms like B.cereus, E.coli, Listeria, Psuedomonas, Shigella, Staphylococcus aureus and Vibriocholerae though higher concentrations only can have any effect against fungal infection. This property of chitosan has been exploited to make reusable cloth bags that will be resistant to bacterial contamination and proliferation during repeated use. Most people keep the reusable bags in their scooters, motor bikes and cars and under the hot and humid climate prevalent in tropical countries like India , right environment is created for the breeding of undesirable bacteria. When such pre-contaminated bags are used again and again to bring purchased foods to homes where they may or may not go into the refrigerator immediately, there exists the possibility of cross contamination, seriousness of which depends on the moisture and nutrient content of the products.

According to commercial claims made by the manufacturers of safe reusable cloth bags using chitosan, unlike others these new innovative bags are lead-free and triclosan-free. Triclosan is an antibacterial and anti-fungal agent that's used in a number of consumer products like soaps, deodorants, toothpastes, cleaning supplies, even trash bags, though its safety credentials are still suspect and may become a part of reusable bags also if laws involving ban of plastic bags are enforced rigorously. Whether a product containing chemicals derived from shrimp can be acceptable to consumers in India, many of them vegetarians, may put a damper to any plans to bring the technology to this country. Of course the best and the least costly approach to the problem of cross contamination from reusable bags is to wash them regularly after every use.

V.H.POTTY
http://vhpotty.blogspot.com/
http://foodtechupdates.blogspot.com