Ash contents should be lowering undetectable in the dissolving pulp. Ash content of four types of bamboo is
lower than the standard requirements, but insoluble ash (silica and silicate) content still very high. Three types of
bamboo dissolving pulp characteristics can meet the SNI 0938:2010: specification of rayon pulp from wood except
acid in soluble ash content. It is necessary tothink about ways to eliminate them, because it will cause the scale in
the digester and clogging the recovery pipes. Acid insoluble ash can reduce by decortications the raw material, and
washing - cleaning system in pulp mill. Results show that the extractive content bamboo dissolving pulp can meet
with SNI requirement.Alkali solubility in18% NaOH solution (S18) and alkali solubility in 10% NaOH solution
(S10) is lower than SNI requirement. Dissolving pulp viscosity (Cupri-ethylenediamine) is very high compare to
wood dissolving pulp about 450-500, which means that cellulose is not much degraded and still long chain.