Abstract: A microtiter plate is made of a light-transmitting antistatic resin and defines at least one well. The bottom wall of the well is centrally equipped with a flat portion having a diameter of at least 1 mm and is preferably connected continuously to the corresponding peripheral wall by way of a rising part. The minimum radius of curvature of the inner wall of said well, said inner wall including said rising part, is preferably at least 0.5 mm.

Abstract: A process for producing an electroconductive film having a volume resistivity of fiber oriented direction of not more than 1.times.10.sup.8 ohm cm comprising mixing from 94.5% to 40% volume of a thermoplastic synthetic pulp with from 5% to 30% by volume of thermoplastic composite fibers comprising of a first component having a lower melting point than that of said thermoplastic synthetic pulp and a second component having a higher melting point than that of said thermoplastic synthetic pulp, and from 0.5% to 30% by volume of electroconductive fibers to prepare a paper stock; forming a wet web from the paper stock; heating and drying said wet web at a specific first temperature to melt the first component of the composite fibers, thereby forming a base paper; and thereafter heating said base paper under pressure at a specific second temperature to melt the thermoplastic synthetic pulp, thereby forming a film having dispersed said second component and said electroconductive fibers therein.

Abstract: Casting mold for metals, wherein paper-like sheet of carbon or graphite fibers is lined onto the inner surface of the mold to prevent seizure phenomenon between the mold and the cast article.