Page:Paper and Its Uses.djvu/172

156 Characteristics of printing papers, 43 Chemical wood, 3, 13 — — microscopical examination of, 110 Cheque papers, 40 China clay, 6 — — as loading, 20 Choosing paper to suit job, 80 Chromo boards, 59 — papers, 49 City and Guilds Syllabus for typography and lithography, 152-53 Classification of fibres, 64 Cloth-lined cards, coloured, 50 Coated boards, 50 — papers, 48 — — ink for, 75 Cockling of cardboards, 72 Coloured cloth-lined cards, 50 — papers, difference in shade of two sides, 85 — papers for pasting, 104 — printings, 45 Colouring matter in papers, 7, 103 — — fastness to light of, 103 — pulp, 20 Common printings, 44 Comparison between hand-, mould-, and machine-made papers, 87 — of strength by tearing, 88 Condition of knives of cutting-machines, 78 Constituents of paper, 6 Copying papers, 53 — — testing, 105 Cost of paper, to find, 146 Cotton, cellulose in, 2 — fibres, 4, 61 — microscopical examination of, 108 Couching, 16 Couch rolls, 23 Cover papers, 53 — — embossed, 54 — — pamphlet, 54 Crayon papers, 42 Cutting machine, condition of knives, 78 — watermarked papers, 79 Cutting machine webs into sheets, 32 Cylinder-dried browns, 56 Cylinder papermaking machine, 25

rolls, 22 — — effect of, 23 — — laid, 23 — — spiral laid, 23 — — wove, 23 Deckle, 15 — straps, 21 Decomposition of gelatine sizing, 76 — of glue in art paper, 76 Defects in paper, 66 Deterioration of mechanical wood papers, 65 — of paper, 63 Difference in shade of two sides of coloured papers, 85 Direction of paper for bound books, 78 Discoloration of paper, 63 Distinguishing between hand- and machine-made papers, 85, 86 — mould-made papers, 87 Drawing papers, 41 — — weights and prices of, 139 Drying cylinders, 23 — sized paper, 29 Duplex boards, manufacture of, 35 Duplicating paper, 52 — — testing, 105 Durability of art paper, 65 — of featherweight paper, 45, 64

paper-testing machines, 100 Edge runner or kollergang, 13 Elasticity of paper, 97 Electricity in paper, 74 Embossed cover papers, 54 Enamelled papers, 49 Engine-sized papers, 21, 39, 41 Envelope papers, 32 Equivalent weights of various papers, 144-45 Esparto, 3 — cellulose in, 2 — fibres, 5, 62 — — microscopical examination of, 110 — testing for, 107 — treatment of, 11 Exercise book covers, 55 Expansion of paper, 68 Extracts from City and Guilds Syllabus for typography and lithography, 152-53