C—3A.

43

Table 20.—Laboratory Newsprint Papers from New Zealand Woods: Insignis-pine Papers.

Furnish. Strength of Water-leaf Paper.*t Colour Analysis. Interpretation of Colour Analysis. j ! j j r j Dirt- j ] Machine- Pulp. Tearing. pa^^ les Primary Hue. Secondary Hue. run No. Natural Weight Bursting! ' s P e . r re ! I or per Thickness, per lb. ! i Folding. jt!ih Re<i - Green, i Blue. White. Etad . | Amount Coloured. Hearn. per Keam,, • Tint. £»£ Tin,. £j£ Cent. j lb " In - Points. Grm. Grm. jSjfcf Cent. Gent. j Cent. Cent. " Per Cent " Per ent - Commercial newsprint (P661) from fast machine .. .. .. 33-0 0-0033 0-30 40 1-22 1 2 74 67 62 62 Yellow 9-0 Orange 0-3 Commercial newsprint (P661) from slow machine .... .. .. .. .. .. .. .. 4 76 69 64 64 Orange 5-8 Yellow 0-5 U.S. Government Printing Office standard .. .. .. 32-0 .. 0-31 .. .. .. .. 70 63 60 60 Yellow 5-4 Orange 0-3 1 .. Commercial groundwood .. 70 Natural .. 33-0 0-0036 0-34 30 0-90 II 3 71 62 52 52 Orange 5-8 Yellow 5-0 Commercial sulphite .. .. 30 2 .. Commercial groundwood .. 70 Coloured .. 35-00 0-0031 0-38 29 0-82 20 5 59 57 53 53 Yellow 2-9 Orange 1-4 Commercial sulphite ... .. 30 3 9 Spruce groundwood .. .. 70 Natural .. 32-0 0-0030 0-33 21 0-65 5 5 79 70 63 63 Orange 5-8 Yellow 1-4 Commercial sulphite .. .. 30 4 9 Spruce groundwood .. .. 70 Coloured .. 32-0 0-0031 0-35 20 0-64 6 3 71 67 64 64 Orange 2-6 Yellow 0-9 Commercial sulphite .. .. 30 5 8 Insignis-pine groundwood .. 70 Natural .. 33-0 0-0032 0-52 30 0-90 30 42 66 56 48 48 Orange 6-4 Yellow 2-7 3266—1 Insignis-pine sulphite .. .. 30 6 8 Insignis-pine groundwood .. 70 Coloured .. 31-0 0-0030 0-41 22 0-70 15 27 52 50 52 50 Magenta 0-6 None 3266-1 Insignis-pine sulphite .... 30 7 8 Insignis-pine groundwood .. 80 Coloured .. 35-0 0-0037 0-39 24 0-69 6 54 57 55 51 j 51 Yellow 2-7 Orange 1-3 3265-1 Insignis-pine sulphite .. .. 12-5 3266-1 Insignis-pine sulphite .. .. 7-5 10 8 Insignis-pine groundwood .. 70 Coloured .. 33-0 0-0030 0-40 25 0-76 13 41 59 56 54 54 Orange 1-9 Yellow 0-5 3265-1 Insignis-pine sulphite bleached 30 11 13 Insignis-pine groundwood .. 80 Natural .. 32-0 0-0037 0-42 19 0-59 9 6 70 61 55 55 Red.. 1-1 None Commercial sulphite .. .. 20 12 13 Insignis-pine groundwood .. 80 Coloured .. 31-0 0-0033 0-34 19 0-62 6 4 63 57 52 | 52 Orange 3-8 Yellow 1-8 Commercial sulphite .. .. 20 13 14 Insignis-pine groundwood .. 80 Natural .. 31-0 -00034 0'35 18 0'59 6 3 71 66 60 60 Orange 3-2 Yellow 3-2 3265-1 Insignis-pine sulphite .... 16 3266-1 Insignis-pine sulphite .. .. 4 14a 14 Insignis-pine groundwood . . 80 Coloured .. .. .. .. .. .. .. 4 67 63 61 61 Orange 2-6 None 3265-1 Insignis-pine sulphite . . .. 16 3266—1 Insignis-pine sulphite .... 4 14b Same as 14a except more dye added in stock-chest .. 32-0 0-0037 0-35 21 0-64 10 2 59 58 58 58 Red .. 0-2 None 37a| 16 Insignis-pine groundwood .. 80 Coloured .. 28-0 0-0030 0-29 14 0-51 5 2 66 61 57 57 Orange 3-2 Yellow 1-4 3281-1 Insignis-pine sulphite .. .. 20 37Bt Same as 37a except more dye added in stock-chest .. 45-0 0-0052 0-40 22 0-49 2 2 56 56 55 55 Yellow 0-9 None] 38f 17 Insignis-pine groundwood .. 80 Coloured .. 36-0 0-0037 0-33 16 0-33 4 3 60 59 59 59 Red.. 0-2 None 328I-I Insignis-pine sulphite .. .. 20 39f 18 Insignis-pine groundwood .. 80 Coloured .. 32-0 0-0030 0-33 15 0"46 5 2 61 61 57 57 Yellow 3-6 None 3281-1 Insignis-pine sulphite .. .. 20 * All strength tests were made at 65 per cent, relative humidity and 72' F. t All papers were run water-leaf except 37a, 37b, 38, and 39.