JPS6485397A - Production of neutral paper - Google Patents

Production of neutral paper

Info

Publication number
JPS6485397A
JPS6485397A JP23703887A JP23703887A JPS6485397A JP S6485397 A JPS6485397 A JP S6485397A JP 23703887 A JP23703887 A JP 23703887A JP 23703887 A JP23703887 A JP 23703887A JP S6485397 A JPS6485397 A JP S6485397A
Authority
JP
Japan
Prior art keywords
paper
paper making
neutral
calcium carbonate
sulfide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23703887A
Other languages
Japanese (ja)
Inventor
Shigehiko Miyamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Paper Mills Ltd
Original Assignee
Mitsubishi Paper Mills Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Paper Mills Ltd filed Critical Mitsubishi Paper Mills Ltd
Priority to JP23703887A priority Critical patent/JPS6485397A/en
Publication of JPS6485397A publication Critical patent/JPS6485397A/en
Pending legal-status Critical Current

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  • Paper (AREA)

Abstract

PURPOSE: To obtain neutral paper capable of using sulfide eyes in the neutral region in pulp dying, having high opacity by paper making pulp slurry including calcium carbonate as loading material for paper making and a sad color agent, in neutral region. CONSTITUTION: The subject neutral paper is obtained by paper making pulp slurry adjusted in paper making pH 6.5 to 9.0, including (A) calcium carbonate as the loading material for paper making, (B) the sulfide dyes dissolved in water as the sad color agent for adjusting brightness, (C) cationic or amphoteric water-soluble polymer. The brightness of the paper is preferably adjusted to 60 to 80% by including 3 to 25 wt.% of A mainly comprising precipitated calcium carbonate and the component B in amount of 5 to 700 ppm based on the fiber weight.
JP23703887A 1987-09-21 1987-09-21 Production of neutral paper Pending JPS6485397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23703887A JPS6485397A (en) 1987-09-21 1987-09-21 Production of neutral paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23703887A JPS6485397A (en) 1987-09-21 1987-09-21 Production of neutral paper

Publications (1)

Publication Number Publication Date
JPS6485397A true JPS6485397A (en) 1989-03-30

Family

ID=17009476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23703887A Pending JPS6485397A (en) 1987-09-21 1987-09-21 Production of neutral paper

Country Status (1)

Country Link
JP (1) JPS6485397A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111021137A (en) * 2019-12-31 2020-04-17 山东华泰纸业股份有限公司 Method for reducing whiteness of newsprint and improving opacity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111021137A (en) * 2019-12-31 2020-04-17 山东华泰纸业股份有限公司 Method for reducing whiteness of newsprint and improving opacity

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