Soy ink is a kind of ink made from soybeans. As opposed to traditional petroleum-based ink, soy-based ink is more environmental

inks contain a minimum of 20% vegetable or soybean oil in its composition and shall be free from harmful hazardous heavy metals and petroleum-based chemicals. 

                                                                      observed in the ink ducts and ink rollers 

                                                                      of the press with fountain solution of pH 

                                                                      value 4.5-5.5 used

(ii)            Ink Mist                                        No ink mist shall be observed when the

                                                                      press is printing at high speed of 10,000

                                                                      impressions per hour with no additives

                                                                       added to the inks