Ink summer the essential reason for effects happen after rising temperatures caused some change. Ink Printing ink pigment and mainly by binding material composition and, in addition, there are some packing and attach charging. For newspaper printing black ink used for bonding material, non-ferrous mineral oils are commonly used as binder ink feeding.
Black ink printing ink on paper, the bonding material (mineral oil) start to the surface of the paper, but after a period of time (4-6 months) of aging, mineral oil absorption, almost all were paper due to its ability to absorb oxygen, and stay in the poor on paper binding material rarely crosslinking, nor rigid structure, only some fragile structure, reason formed many small ink particles.
Vegetable oil ink printing ink on paper, the bonding material (vegetable oil) started in paper surface, but because it absorbs oxygen ability, after a period of aging, vegetable oil of paper, but many absorbed by remain in paper and pigment sticking together. Because of unsaturated oils have chain structure, reason can double the stiff formed some crosslinking, and adhere to the fiber structure.
Mineral oils inks and vegetable oil ink printing of old newspapers in pulp machine pulp, mineral oil is more easily ink of vegetable oils ink broken, so after the break of the ERIC value high (effective residual ink particles concentration), and fully in the slurry after washing the irreversible again the ink particles deposited is larger also, the concentration of waste paper pulp of greater influence degree of white.
2. Ink summer effect dialogue degrees influence
Canada deinking pulp whiteness every June - August are minimal. North America deinking pulp whiteness annual 7-8 months than normal, lowest low about 1.4%. Our factory waste paper desizing whiteness is 7-8 months each year minimum. Such as: 98 years minimum whiteness lifetime (46.2%, 99 rate lowest rate of whiteness, 2000 (71.2% rate 2.6% lowest white degrees, in 2001, the lowest rate of 11.3 whiteness. Therefore, whether the country or region, waste paper deinking inks summer effect is widespread.
