JPS6485397A - Production of neutral paper - Google Patents
Production of neutral paperInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-09-21 JP JP23703887A patent/JPS6485397A/en active Pending
Cited By (1)
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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