Tiny, transparent openings in a coating film which can be attributed to surface contamination, cracks, dirt, coating contamination, surface tension, static electricity, screen clogging, abrasion of the film, agglomerates in the coating, rapid solvent loss, and the like. Any small hole that permits the passage of light.
Small, light passing holes in the emulsion of a photographic negative. Must be opaqued before platemaking.
Tiny holes or imperfections on the surface of the paper caused by the presence of foreign matter on the paper surface during manufacture.
Small holes present in the foil or print.
Small holes visible on the surface of soldered joints, which generally indicate the presence of a larger void within the joint. Typically caused by the generation of gas during solidification due to presence of salts and water. Sometimes called blowholes.
Small holes in the glazed surface of the ware after firing.
Small defects in finish film caused by surface contamination. Resembles tiny holes in the finish.
Tiny holes in the emulsion of negatives or printing plates.
are tiny holes penetrating a glazed surface.
A tiny hole created when air escapes from the surface of a coating and the coating does not flow back into the void area.
coating defect consisting of the randomly spaced small round holes (as a straight pin would make in the cured film) which quite often occur in large numbers. The open area (pinhole) usually exposes bare substrate. Contaminated substrate or improperly dispersed lubricant or additive may cause pinholes. Pinholes are typically caused by laminations, inclusions, scratches or gouges.
Tiny holes in the emulsion of a photographic negative that must be opaqued before plate making.
Imperfections in the surface of a ceramic body or glaze.