Design and Production of Paper for the New

EncasementsTimothy Barrett

University of Iowa Center for the Book

Background

Rags

Fiber hemp, f and c

Cotton bump

Cotton hank

Floc cutter

Floc cut close

Beater

Deckle Box

Lower D Box

Add pulp

Shake

Shake close

Deckle off

Couch 1

Couch 2

Couch 3

Press 1

Press Inflated

Drying

Drying 2

Paper AnalysesTEST 1950 NBS 2000 UICB alpha cellulose 92.0 98.9 beta cellulose 7.1 gamma cellulose 0.9 copper number 0.5 pH hot extract 9.0 6.85 cold extract 8.9 9.62 ash, oven dry basis

5.4%

alkaline reserve 1.3% kappa number 1.9* *This value determined by NARA was in line with the kappa numbers they have obtained for fully bleached wood pulp paper and board submitted to them as Ōlignin free.Õ N.B. The 2000 UICB paper also passed both the Oddy test, which looks at emissions that tarnish silver, lead or copper, and the photoactivity test, which checks the material in question against a colloidal silver detector (which may fade or get darker depending on the reaction) and a gelatin stain detector.

Resolved

Unseal Old

Mill New

Paper AnalysesTEST 1950 NBS 2000 UICB alpha cellulose 92.0 98.9 beta cellulose 7.1 gamma cellulose 0.9 copper number 0.5 pH hot extract 9.0 6.85 cold extract 8.9 9.62 ash, oven dry basis

5.4%

alkaline reserve 1.3% kappa number 1.9* *This value determined by NARA was in line with the kappa numbers they have obtained for fully bleached wood pulp paper and board submitted to them as Ōlignin free.Õ N.B. The 2000 UICB paper also passed both the Oddy test, which looks at emissions that tarnish silver, lead or copper, and the photoactivity test, which checks the material in question against a colloidal silver detector (which may fade or get darker depending on the reaction) and a gelatin stain detector.

Baty Barrett

3

4

5

6

7

0 2 4 6 8 10ml 0.01 M HCl Added

pH

Unsized Whatman Paper

Photobone-Sized Whatman Paper

'Assembled' Parchment-SizedWhatman Paper

Tim and Lynn