The perga liners consist of a series of water colour pencils (A) and a series of basic pencils (B). For the wet technique, also called water colour technique, you first use the B-pencils and subsequently apply the colour of the A-pencils to the parchment papaer using a damp brush. For the dry technique you exclusively use the B-pencils. Advice: For the sharpening of the perga liners use a special sharpener made for colouring pencils, for instance the Bruynzeel Color Express. This sharpener is available at the better craft shops. In addition you will find a convenient overview of all colours and matching codes inside this box. These codes are mentioned in the work descriptions.