Method for manufacturing preparat for measuring fiber length, method for preparing dispersion for measuring fiber length, method for measuring fiber length, preparat for measuring fiber length, fiber length measuring device, and control program for fiber length measuring device

摘要

A method for producing a preparat for measuring a fiber length, a method for preparing a dispersion, a method for measuring a fiber length, a preparat for measuring a fiber length, a fiber length measuring device, and Provides a control program for the fiber length measuring device. In the method for producing preparat for measuring fiber length of the present invention, a pre-dispersion step of preparing a pre-dispersion solution by adding fibers and a dispersion medium having a predetermined viscosity so that the concentration of the fibers is 0.1% by mass or less in a sealable container (step S1) and a fractionation step of fractionating a part of the preliminary dispersion (step S2); a dilution step of preparing a dispersion by adding the dispersion medium so that the concentration of the fibers is 0.005 mass% or less (step S3); It is characterized by including a casting process (step S4) which spreads thinly on the base material which has light transmittance.