Abstract: A microcellular low density foam of poly(4-methyl-1-pentene) which is particularly useful for forming targets for inertial confinement fusion has been developed. Articles made from the foam have been machined to tolerances of 0.0001 inch, although the densities of the fragile foam are low (about 10 to about 100 mg/cc) and the cell sizes are small (about 10 to about 30 .mu.m). Methods for forming the foam and articles are given; and the yield strength of the foam of the invention is higher than was obtained in other structures of this same material.

Abstract: A process is provided for producing a pressure-sensitive carbonless record sheet comprising the steps of preparing a hot melt coating composition, the hot melt coating composition being water insoluble and having a melting point of from about 60.degree. C. to about 140.degree. C. The hot melt coating composition includes a chromogenic material. The chromogenic material is a meltable color developer of the acidic electron accepting type. The hot melt coating composition is heated to a temperature above its melting point and the heated coating composition is applied to a substrate, the coating composition being applied at a coat weight of from about 0.2 pounds to about 8.0 pounds per 3300 square feet of substrate. The coating composition is set by cooling the coated substrate. A novel liquid chromogenic coating composition is produced, the coating composition having a melting point of from about 60.degree. C. to about 140.degree. C.

Abstract: A jet drop printing process utilizing a radiation (UV, electron beam, etc.) curable ink composition. The ink composition includes a low molecular weight multifunctional ethylenically unsaturated material, a low molecular weight monofunctional ethylenically unsaturated material, a reactive synergist, a dye colorant, and an oil soluble salt. A small amount of organic polar solvent and stabilizer may also be included. In addition, when a UV cure is used, a photoinitiator is also added to the mixture. In order to function properly in the jet drop printing process, the ink composition should have a viscosity of less than about 15 centipoise, a resistivity of around 50-5000 ohm-cm, and a surface tension of approximately 20-70 dynes/cm.