Sodium carboxymethyl cellulose is now employed in American paper industry. In Japan the sizing material such as wood rosin mainly imported from America. By the government control it is difficult to satisfy the necessity of paper sizing.
In this paper reported on the problem of sodium carboxymethyl cellulose sizing, which chiefly treated of the manufacturing conditions and the application in beater sizing .
The composition of reaction system isC₆H₁₀O₅ : CH₂COONa : NaOH = 1: 1 .5 : 3.
As the results of application in beater sizing obtained that, the limit amount is 2% of pulp weight, as compared with rosin size show that three times of sizing effect, and increased paper strength.

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In the pulp, paper or rayon industries, it is often seen that the oxidation of cellulose in many processes has influence on the qualities of manufactures.
In the present paper, the discussion on the chemistry of oxycellulose is given.

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In order to supplement the previous report, we inquired the results cooked with liquor of same CaO content in cooking liquor and liquor ratio have correspondingly various values.
When CaO ratio to chips is constant, the lower sulphite content, the shorter cooking time and more screenings and alfa-cellulose content of the same viscosity pulps scarcely related to the sulphite content and liquor ratio.
Within a normal range of CaO ratio to chips, screened pulp yield does not change along with them, but only when CaO ratio is extremely low, pulp yield generally decreases. For the pulps with same Sieber No., pulp yield and ash content decrease with lower sulphite content in cooking liquor and higher liquor ratio even when CaO content is constant.
In short, we found that these must be some absolute amount of CaO in sulphite cooking liquor for Rayon pulp, but also sulphite concentration in cooking liquor greatly influenced to the properties of the pulp produced.

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