Acid etching gives different effects and textures to the surface of the glass. This depends on the type of acid used and the length of time it is left to burn into the glass. Due to the nature of the work this can be a very time-consuming procedure. You will find examples of this type of work in many pubs and very old houses. Because the design is cut out by hand it is possible to have quite intricate detail, and each design is made exactly to the individual's specifications.