Material Quality Control

Prevention of Foreign Matter in Contamination:

The prevention of all foreign matter of all types such as found of screw, piece of metal, or glass in a product, Human hair or a housefly or rodent excreta is closely linked with Good hygiene.

The quality control chemist must approve the material must be checked for rodent contamination and the presence of insect fragments. Solution or sieving tests will reveal any foreign matter. Raw materials received in sacks, wooden cases or paper-lined cartons may easily become contaminated during opening. Q.C inspectors must see that packages are dealt with correctly and always away from production.

And electronic sorting must be done for nuts and beans and works on the basis of rejection of any unit that is the incorrect color. Electromagnets are very necessary to extract metal such as bolts, screws, and metal implements from raw materials or partly processed products in the finished product.

When processing involves dissolving a raw material to a liquid as with chocolate vibratory and pipeline sieves is a valuable method. These are final safe guard against stray pieces of metal or nuts and bolts that may detach the working of the machine.

What ever the precautions are taken in the production processes, some foreign matter will get through the finished product, and the additional means such as Electronic metal detectors, X-ray detectors detect this and eliminate.

Other causes of foreign matter are personal belongings such as pins, hair clips and buttons, stationery, and small ancillary equipment can be quite a serious factor for this personal care and strict supervision will prevent this causes.  

Travel tests must be taken after the manufacturing of the finished product and while transportation of the goods. To test cartons a laboratory hydraulic press fitted with flat platforms is used.