Unbleached sulfate

Folding carton inks are designed for printing on paper board (or boxboard) substrates used in fast food carry out packages, pastry cartons, cereal boxes, mail containers, auto parts boxes, beverage carriers, milk and juice cartons, and other packages. Folding cartons are made from soHd bleached kraft or solid bleached sulfate (SBS), unbleached kraft, solid unbleached sulfate (SUS), clay coated unbleached kraft, recycled paperboard, and coated paperboard. 

These rosin-based sizes, whether paste, Hquid, or emulsions, can be used to size all grades of paper that are produced at acid pH. The latter include bleached or unbleached kraft Hnerboard and bag paper, bleached printing and writing grades, and cylinder board. In addition, polyaluminum compounds have been used in place of alum, most notably, polyaluminum chloride (48), which can reduce barium deposits where these have been a problem. The barium chloride by-product is more water-soluble than barium sulfate. Other polyaluminum compounds such as polyhydroxylated forms of alum and polyaluminum siHcosulfate have been evaluated as alum replacements. 

When chlorine dioxide is used for pulp bleaching in conjunction with the Kraft (sulfide) process for chemical pulping, by-product sodium sulfate can be used as a source of makeup sulfur and sodium consumed in the chemical cycle. The demand for sodium and sulfur in pulp bleaching is related to the loss of these chemicals through carryover in unbleached pulp. As process improvements have sought to reduce pollution from pulp mills, less sodium sulfate makeup is required. The trends in pulp bleaching to increase substitution of chlorine with chlorine dioxide have caused an oversupply of sodium sulfate, so that this by-product is often regarded as waste (81). 

After the chemical treatment, the pulped wood is removed, washed, and screened. Unbleached, brown-colored paper is made directly for this material. Most whitened or bleached paper is made by the treatment of the pulp with chlorine, chlorine dioxide, hypochlorite, and/or alkaline extraction. In general, sulfate-pulped paper is darker and requires more bleaching and alkaline extraction to give a white pulp. 

Ray cells in unbleached sulfite and sulfate pulps (weight %) Distributed on 8 6... 

Materials. A number of papermaking pulp samples, including bleached and unbleached, sulfite and sulfate, hardwood and softwood, and semichemical varieties, were analyzed thermogravimetrically. Some of these pulps, artificially aged at elevated temperatures and humidity, were also included. A list of the pulps and the codes assigned to them for easier reference are given in Table I. 

Analytical Characters.—(1.) Its intensely bitter taste. (3.) Its alcoholic solution, when shaken with a potassium salt, gives a yellow, crystalline ppt. (3.) An ammoniacal solution of cupric sulfate gives a green, crystalline ppt. (4.) Glucose, heated with a dilute alkaline solution of picric acid, communicates to it a blood-red color. (5.) Warmed with an alkaline solution of potassium cyanid, an intense red color is produced (the same effect is produced by ammonium sulfhydrate). (6.) Unbleached wool, immersed in boiling solution of picric acid, is dyed yellow. 

Sykes and Hammes [43] have described the adsorption of both of these cationic polymers onto hair from solutions of different amphoteric and anionic surfactants. Analogous to the adsorption of polymer JR, uptake values were greater onto bleached hair than onto unbleached hair, and greater from amphoteric systems like cocobetaine or cocoamphyglycinate than from anionic surfactants like sodium lauryl sulfate or triethanolam-monium lauryl sulfate. 

CP = chemical pulp RP = recovered paper BHSP = bleached hardwood sulfate pulp BSSP = bleached softwood sulfate pulp UBSSP = unbleached soflwood sulfate pulp... 

Sacks are made from paper based on unbleached or bleached sulfate pulp. The sacks are mainly used for packaging building materials, food, chemicals, and animal feed. (See Table F-7.)... 

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