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Table 3 pH values of paper samples before and after accelerated degradation

From: Nano calcium carbonate versus nano calcium hydroxide in alcohols as a deacidification medium for lignocellulosic paper

Sample designation

P1

P2

After deacidification treatment

After accelerated degradation

After deacidification treatment

After accelerated degradation

pH

SD

pH

SD

pH

SD

pH

SD

U

4.8

0.2

4.7

0.1

6.0

0.1

6.0

0.1

CS E

9.4

0.2

7.7

0.1

10.2

0.1

8.3

0.1

CS iP

10.2

0.3

8.0

0.1

10.3

0.1

8.3

0.1

NR E

9.1

0.1

6.9

0.1

9.7

0.1

7.9

0.1

NR iP

9.3

0.1

6.8

0.1

9.7

0.1

7.9

0.1

C E

7.9

0.1

7.6

0.1

8.6

0.1

7.8

0.1

C iP

7.8

0.1

7.6

0.1

8.4

0.1

7.7

0.1