Recently the fibers other than wood fibers have come to utilize as the paper making raw material worldly.
The non-wood fiber resources for pulping is considered as useable economically for industrialization.
In this report, several vegetable fibers are studied except the wood fibers as the natural resourees for pepar making pulp.

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A new method for measurement of WVT is reported here. Akker's comparison method which is based on the use of electric hygrometer was improved. The following were the objectives :
1. Device must be appropriate to measurements of the WVT of different kinds of coated paper.
2. Faster measurement than JIS method should be made.
3. The electric hygrometer which is response to the higher humidity range (60-90% R.H.) should be used.
We measured the WVT of polyethylene coated krafts using improved comparison method, and decided such test conditions as the results of our method accord with the results of JIS method for example, number of tests, standardization of resistor of permeation, acceptable accuracy of electric hygrometer, etc.

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The treatment of industrial waste liquor has given rise to an important problem in chemical industry especially pulp and paper industry lately.
The research has been carried out in order to put the recovering method of chemicals from SCP black liquor by pyrolysis to practical use.
Experimental installation is a series of arrangements composing of a reactor, cyclones and a condenser. The reactor of 200mm in internal diameter and of 4.5m in length was used and it was heated by means of electric heating from the outside.
The effect of temperature of reactor wall exerting on the yield and component of products and the sticking probability of scale to reactor wall was examined in this report.
The results obtained were summerized as follows.
1) The most desirable result is obtained at the reactor wall temperature of approximately 700°C
2) The produced gases containing H₂, CO₂, CH₄, H₂S, CO, C₂H₄ have a calorific value of about 3000kcal/kg.
3) In the solid residue, Na₂CO₃ is a major inorganic compouet and a certain quatity of Na₂SO₄ and carbon is contained, but only trace of Na₂S and Na₂SO₃ is found.
4) The sticking of scale to reactor wall is never at approximately 700°C.

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