A layer of paper that separates décor paper from kraft paper. It may not be always used.
Transparent paper pressed on top of décor paper to improve scratch resistance and protection of printed design/color.
Alphabetically:In EN 438-3: ,three letters are used to classify a laminate:1st letter : H for Horizontal application or V for Vertical application.
2nd letter : G for general purpose or D for Heavy-Duty.
3rd letter: S for Standard quality, P for Post forming grade or F for Flame retardant.Numerically:
A numerical system is also defined in relation to the three important characteristics:
Abrasion resistance : overlay related.
Impact resistance : laminate thickness related.
Scratch resistance: texture type related.