Passe par tour ( from the French. - "The passe par") is held everywhere.
Passe-partout – This board , which is cut in a certain way by opening the photo , needlework , or reproduction , thus achieving a balance between the image and the frame , significantly expanding the perception of the work . Also on the mat can put an autograph person depicted in the photograph. The most useful feature of the mat , a protection against a variety of actions on the object , such as dust, deformation.
By type of cardboard used , there are several kinds of mats.
MUSEUM PASSEPARTOUT – made from special types of cotton fibers ( recycled fibers ) that are not handled by aggressive chemicals , respectively , and do not contain them , so they can not affect the valuable specimen . The topsheet museum paperboard usually colored by dyes.
CONSERVATION PASSEPARTOUT - It made from 100 % alpha - tsellulozy ( purest form tsellulozy ) . It does not contain acids , lignin and wood chips , as well as optical brighteners . Conservation board is resistant to fading for a long period of time. The front part is colored using pigment dyeing .
RESERVATION PASSEPARTOUT – sawdust , between which the cotton fibers are laid . It has a small amount of chemicals to maintain for a long time, the optimal level of acidity .
NORMAL (standard ) PASSEPARTOUT - ordinary cardboard
Passepartout is most often used for decoration works executed on paper.