Process for facilitating the use of high lignin containing waste paper in the manufacture of paper products

A process for increasing the amount of inexpensive high lignin containing waste paper used as feedstock in the manufacture of paper products exhibiting GE brightness value of about 60 to 85, said process comprising conducting a spectrophotometric analysis of handsheets made from waste paper feedstock before and after treatment of the handsheets with phloroglucinol, the spectral analysis including CIE a* color measurement and determining delta a* values between the untreated and treated handsheets and using the delta a* values to select deinking and bleaching processes and controlling the amount of high lignin fiber feedstock which is to be utilized to produce absorbent paper products exhibiting GE brightness of about 60 to 85.

A process for tailor blending high lignin waste paper pulp with other waste paper pulp to produce paper products having predetermined commercially acceptable brightness properties comprising conducting a spectrophotometric analysis of handsheets from pulps derived from various waste paper sources before and after treatment with phloroglucinol, the spectral analysis including CIE a* color measurements and determining the delta a* values of the untreated and treated handsheets and using the delta a* values in blending the combination of waste paper pulp for appropriate deinking and bleaching treatment and to produce paper having the desired brightness while including the maximum amount of the low cost high lignin containing groundwood fiber.

An economical high speed process for increasing the amount of inexpensive and readily available high lignin containing waste paper used in the manufacture of paper products exhibiting commercially acceptable brightness, said process comprising conducting in less than ten minutes a spectrophotometric analysis of handsheets from waste paper pulp before and after treatment of the handsheets with phloroglucinol, the spectrophotometric analysis including CIE a* color measurement and determining the delta a* values between the untreated and treated handsheets and using the delta a* values to select the deinking and bleaching process and controlling the amount of high lignin fiber feedstock which can be utilized to produce paper products having predetermined commercially acceptable brightness properties.

A rapid process for determining groundwood in pulp derived from waste paper, said process comprising conducting a spectrophotometric analysis of handsheets made from said pulp before and after treatment of the handsheets with phloroglucinol, the spectral analysis including CIE a* color measurements and determining delta a* values between the untreated and treated handsheets.

An economical high speed process for increasing the amount of inexpensive and high lignin containing waste paper used in the manufacture of paper products exhibiting commercially acceptable brightness, said process comprising conducting in less than ten minutes a spectrophotometric analysis of handsheets from waste paper pulp before and after treatment of the handsheets with phloroglucinol, the spectrophotometric analysis including CIE L* color measurements and determining the delta L* values between the untreated and treated handsheets and using the delta L* values to select the deinking and bleaching process and controlling the amount of high lignin fiber feedstock which can be utilized to produce paper products having predetermined commercially acceptable brightness properties.

An economical high speed process for increasing the amount of inexpensive and high lignin containing waste paper used in the manufacture of paper products exhibiting commercially acceptable brightness, said process comprising conducting in less than ten minutes a spectrophotometric analysis of handsheets from waste paper pulp before and after treatment of the handsheets with phloroglucinol, the spectrophotometric analysis including CIE b* color measurements and determining the delta b* values between the untreated and treated handsheets and using the delta b* values to select the deinking and bleaching process and controlling the amount of high lignin fiber feedstock which can be utilized to produce paper products having predetermined commercially acceptable brightness properties.

An economical high speed process for increasing the amount of inexpensive high lignin containing waste paper used in the manufacture of paper products exhibiting commercially acceptable brightness, said process comprising conducing in less than ten minutes a spectrophotometric analysis of handsheets from waste paper pulp before and after treatment of the handsheets with phloroglucinol the spectrophotometric analysis including CIE brightness measurements and determining the delta brightness values between the untreated and treated handsheets and using the delta brightness values to select the deinking and bleaching process and controlling the amount of high lignin fiber feedstock which can be utilizing to produce paper products having predetermined commercially acceptable brightness properties.