(Uncoated papers are rarely suitable for screens above 150 lpi.) Coated or uncoated papers may have their surfaces polished by calendering.Mill broke or internal mill waste This incorporates any substandard or grade-change paper made within the paper mill itself, which then goes back into the manufacturing system to be re-pulped back into paper.
Dioxins are highly toxic, and health effects on humans include reproductive, developmental, immune and hormonal problems.21 Paper may be classified into seven categories: 22 Printing papers of wide variety.Blotting papers containing little or no size.
2015 In vielen Büros wird unnötig viel ausgedruckt, Zeit Online, "Effluents from Pulp Mills using Bleaching PSL1".Anything heavier than 160 g is considered card.On the paper machine, the most common is the steam-heated can dryer.
Wrapping papers for the protection of goods and merchandise.In the groundwood process, debarked logs are fed into grinders where they are pressed against rotating stones to be made into fibres.For representing value: paper money, bank note, cheque, security (see security paper voucher and ticket For storing information : book, notebook, graph paper, magazine, newspaper, art, zine, letter For personal use : diary, note to remind oneself, etc.; for temporary personal use: scratch paper For.
The microscopic structure of paper: Micrograph of paper autofluorescing under ultraviolet illumination."Chemical Degradation of Cellulose in Paper over 500 years".Restaurator: International Journal for the Preservation of Library and Archival Material.