JPS6127297A - Mount for photograph album - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mount for a photo album, and more particularly to a mount for a photo album that reduces discoloration of photos that occurs when the photos are stored for a long period of time.

Many documents and standards related to the storage stability of photographic images have already been published and determined, and among them, the 15OI Dis5466 standard determines the optimal storage conditions, and also describes the conditions for recommended paper materials. ing. The inventors made paper based on these conditions and conducted a preservation test for photographic images, but they were not able to obtain a paper that was necessarily satisfactory. As a result of investigating the cause of this, it was discovered that even if the conditions based on the standards are met, there are differences in storage stability due to differences in the materials used, the amounts used, etc.

In the present invention, a cellulose-reactive sizing agent is added within 0.5%, more preferably 0.25% or less, to cotton pulp and/or bleached wood pulp, and if necessary, cationic polyacrylamide is added as a fixing agent for the sizing agent. ．． Within 5%,
More preferably, the paper surface p■ of paper to which 0.25% or less is added
This is a photographic album mount, characterized in that the number is in the range of 6.0 to 9.0.

The pulp used in the present invention includes cotton pulp, bleached wood pulp, LBKP, and NBKP.
Chemical pulps such as , LBSP and NBSP are preferred. The pulp is pre-treated with Na1lC03, N02C (h etc.)
It is best to adjust it to +7 to 8. As the cellulose-reactive sizing agent, alkyl ketene dimer and alkenyl succinic acid sizing agents are preferred. It is also possible to use cationized starch, but the discoloration of the photographic image is greater than that of the previous garment. The fixing agent effectively shakes up a small amount of the sizing agent, and this fixing is particularly effective in the present invention because the usage rate of the sizing agent is kept as low as possible in order to minimize discoloration.

The cationic polyacrylamide used as the fixing agent is one that contains few impurities such as metal ions, sulfate ions, and chloride ions. As a filler, ρ1 at the time of paper making
Although it is possible to add calcium carbonate up to about 20% of the pulp based on the amount of calcium carbonate, discoloration increases as the amount of calcium carbonate increases.

, paper po is in the range of 6.0 to 9.0, more preferably 6
．． A value in the range of 5 to 8.5 may cause less discoloration.

If the pH is less than 6.0, particularly 4 or less, the blue discoloration will be large, and if the pH exceeds 9.0, especially 10 or more, the reducing cyan color will be large. Furthermore, starch, PVA, etc., which are commonly used as paper surface treatment agents during paper making, are undesirable because they tend to block the image surface during photographic storage.

Next, the present invention will be explained with reference to Examples.

Paper having a basis weight of 500 g was made using a circular wire paper machine according to the formulation shown in Table 1. The pulp freeness was 400 ml of C3'F. Further, the pH of the paper surface was adjusted by controlling p and 11 during paper making. Basic soda, bicarbonate of soda, and sulfuric acid were used to control the pH during papermaking. The obtained paper was evaluated by overlapping the standard photographic Fuji Film 08 paper and the paper, pressing it lightly with a glass rod and leaving it in a dark place at 50°C and 86% RH for 30 days, and measuring the degree of discoloration using a Fuji photographic densitometer FSD1.
Measured using '03. The results, including comparative examples, are shown in Table 1. Of the materials ゛□ Vercon W: Dainippon Ink & Chemicals, alkyl ketene dimer polystron 619: Arayo Kagaku, cationic polyacrylamide Homozize 7A: Kindai Kagaku Kogyo ■, petroleum sizing agent for neutral paper Not shown.

The density change after saving only the photo is +0.10 for the white part of the photo when using the blue filter, +0.04 when using the green filter, and ±0.0 when using the red filter, and 100 for the gray part, respectively. '06, +'0.01
, +0.01.

Procedural amendment band Showa year, month, day 1, case indication 1982 patent order No. 149218
No. 2, Name of the invention Photo album mount 3, Relationship with the case of the person making the amendment Applicant name (540) Honshu Paper Co., Ltd. Fujicolor Sales Co., Ltd. 4, Agent 6, Subject of amendment Details of the invention in the specification Explanation column Procedural amendment 1, Indication of the case 1982 Patent application No. 149218 2, Name of the invention Mount for photo album 3, Person making the amendment Relationship to the case Applicant name (540) Honshu Paper Co., Ltd.
Fujicolor Sales Co., Ltd. 4, Agent 5, Date of amendment order Voluntary 6, Subject of amendment Detailed explanation of the invention in the specification column 1, page 2 of the specification, line 1θ Correct the material conditions.

2. On the 2nd page, line 13, "Based conditions" is corrected to "Based paper material conditions."

3. On the 4th page, line 7, amend "Great.' to become E great."

4. Correct "Standard Photographic Fuji Film 08 Paper" in lines 18 and 19 of page 4 to "Fuji Color Paper 08 type (manufactured by Fuji Photo Film), which has been properly developed according to the standard prescription."

Claims (1)

[Claims] The paper surface pH of paper prepared by adding cellulose-reactive sizing agent within 0.5% to cotton pulp and/or bleached wood pulp and, if necessary, adding cationic polyacrylamide within 0.5% as a fixing agent, is 6.0. A mount for a photo album characterized by a temperature of ~9.0.