A direct impact on the safety of the food packaging printing packaging materials, especially edible life safety, food packaging and printing high quality complaint is also heard, caused disease and death we have to ponder.Currently the market is flooded with colorful packaging, a lot of people and even for packaging buy unnecessary items.This phenomenon has become widespread, also called excessive packaging.
People enjoy the beautiful packaging, these taste pretty "dress" is also given attention, especially in food packaging.This is a very important issue - food packaging printed security issues.Made from eco-friendly materials paper or cardboard carton packaging for cigarettes, food, child nutrition, breakfast, after processing through a variety of printing methods, ink adhesion on paper for packaging contents adverse effects, whether there will be transfer of harmful substances in the food?Especially like cigarettes printing gravure inks, of these formulations ink printed materials security how to verify the test it?
We know, after the printing of the packaging material has a different degree of odor, it depends on used in the printing method and the ink composition may be.How to evaluate these odors?Should first, our emphasis is not what its odor is, but after the printing-shaped packaging material impact on the packaging contents.We hope that the packaging of their odor and taste of the content should be kept as no effect.
As we all know, taste and smell is a chemical feeling, its stimulating effect is the result of the reaction of biomolecules.Scientists study proved: the different position of the tongue will produce sour, sweet, bitter, salty taste effect, our sense of smell is more sensitive and can quickly sniff out the nuances of the smell, but the nose is also very easy because of "fatigue "instead continue to work, it is generally recommended perfume manufacturer not continuous to identify three or more kinds of odor.Then, the odor of the packaging printed in the end how to detect what is the standard?
Although the current universal standard is not perfect, but for this regard detect advanced test methods is still very worth learning.To brief the two detection methods used by the printing industry in Germany, for reference only.
The first method is called Robinson assay Robinson detection method defined in the German standards DIN10955 "packaging material impact on the taste of the test substance.For printing, we are concerned with the influence of the solvent residue in the ink after printing, Therefore, the printing is usually using a modified the Robinson test method (MHM), in order to achieve the purpose of the detection.In the detection process, after the substrate surface 1.5g/m2 the amount of ink printed, and then the printing and packaging products, for example, mounted on the chocolate after a certain time (approximately one day) packaging taste evaluation, the results are usually divided into 5, etc.: 0: Taste no change; 1; difficult to distinguish the taste changes; 2: Taste minor changes; 3; taste change; 4: Taste noticeable change.Sometimes, it was also in the actual environmental conditions for testing, for example, the tray on the high-humidity conditions of 75% RH for detection, the results of doing so usually there will be large differences in the method specified in DIN10955.
The second is called a gas chromatographic analysis, the analysis method in the production of intaglio printing of packaging materials widely used.Analyzed by gas chromatography can be objectively determined and printed on the packaging of the content of the residual solvent and other odor.Gas chromatographic analysis of the process, the gas is passed through a separation column, and the measurement by the detector, even a small amount of gas can also be detected.Flame ionization detector (FID) is the main detection tool.The detector is connected to the PC, so as to record the next time, and the amount of gas leaving the separation column.Known fluid color chromatography identified the free monomer.Meanwhile, through the measurement of the recording peak area and compared with the known volume, the free monomer content can be obtained.Examine the folding carton unknown monomer situation, it is usually used in conjunction with gas chromatography and spectrometry (MS), by mass spectrometry to identify unknown monomer.
In the the vapor spectrum analysis method, the headspace analysis of the methods typically used for analysis of the folding carton.Will be tested sample placed in the sample vial is heated, the monomer being analyzed gasification and into the head space, the subsequent process is the same as with the previously described test procedure.
Of course, these two methods by experimental means after the ink on the printed matter of the smell and taste of the packaging safely quantitative detection carton packaging printing is environmentally friendly, safe and provides a clear method to evaluate.Our printing department can refer to foreign advanced detection methods and international standards, worked out with international standards, testing methods and standards in line with our production situation, so as to promote the development of the printing.
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