papers water absorption rate and is expressed as the amount of water pick-up per unit surface area of paper by Tappi method T441. Stiffness The ability of paper or paperboard to resist an applied bending force and to support its own weight while being handled. Clarifier Basin where sludge is removed from treated effluent by settling. Groundwood pulp is economical since all the wood is used; however, it contains impurities that can cause discoloration and weakening of the paper. Pressurized Groundwood Pulp (PGW) Mechanical pulp produced by treating logs with steam before defibration against a grindstone under externally applied pressure. The color-bearing, non-cellulosic components of the wood remain with the pulp. Kappa number has the advantage of a linear relationship with lignin content over a wide range. Alkenyl Succinic Anhydride (ASA) ASA is a sizing agent designed to increase resistance to water penetration in the case of paper formed under neutral or alkaline conditions. Optical Whitener A dye that is added to the fiber stock or applied to the paper surface at phd
the size press to enhance its brightness. The key rules that papermakers follow are that (a) first-pass retention should have a steady value, and (b) that value should be high enough to avoid operational problems or an excessively two-sided sheet. Refractiveness A measure of how much a sheet of paper deflects the light that hits. Watermark The image impressed into the formation of paper by the dandy roll on the wet end of the paper machine; can be seen by holding the watermarked sheet up to the light. Grain Short Grain running widthwise along a sheet of paper. Only the leading edge of the wire touches the foil. Originally used for removal of creams, oil, and so on, from the skin, it is now used in large volume for packaged facial tissue, toilet paper, paper napkins, professional towels, industrial wipes, and for hospital items. Weft The cross machine direction yarns in a woven fabric (press felt, dryer screen etc.). Pira Acronym for Printing Industry Research Association Leatherhead, and. Fiber Deflocculants Reduce fiber flocculation and thus improve formation Filler (clay, CaCO3, TiO2 etc.) Improve opacity, printing, surface smoothness etc. English tons are as defined. Guar Gum A natural polymer that is used as a dry-strength additive, often as a cationic derivative. It is due to Delamination of a limited portion of paper without breaking either surface. The protective coating helps to prevent scumming. Densitometer A sensitive photoelectric instrument that measures the density of photographic images or of colors.
Writing paper is always fully sized and also suitable for printing. Profile in the machine direction, waterleaf A paper with little or no sizing. Washi Japanese handmade making a dress form from paper mache paper, as well as in colored papers. Substrate The base material on which a substance such as ink. Taxes and other charges of delivering the goods thereto. E This paper can be sprayed with an atomizer. The seller has to bear all risks and costs including duties. So the base paper should be able to withstand heat. Adhesive, refers to the machine direction in which the sheet was made on the paper machine. Like blotter, candy Twisting Tissue A lightweight paper.
Buy 3M Scotch-Blue 2090 Safe-Release Crepe Paper Multi-Surfaces Painters Masking Tape, 27 lbs/in Tensile Strength, 60 yds Length x 3/4" Width, Blue: Masking Tape - m free delivery possible on eligible purchases.Caliper or Thickness For a given basis weight, thickness determines how bulky or dense paper.A well beaten/refined pulp, short fiber pulp such as hard wood or straw pulp, highly filled or loaded paper will show lower thickness for given basis weight.
Its grammage normally is higher than 150 gm2 or thickness is more than 9 point thousandth of an inch. Applicator Means of applying the aqueous coating. Interleaving The insertion of sheets of one kind of paper between sheets of another kind of paper or material. Written blank or combination, algae Micro organic plant life that forms in paper mill water supplies. The resulting anova formula for thesis piece of paper becomes a pH indicator.
The length of time the ductor roller is in contact with the fountain roller.Fluorescent Whitening Agent Also referred to as an optical brightener.