Pentalic Aqua watercolour journals. Journals are European milled, 60kg (300-gramme per square metre) Neutral pH watercolour paper provides the perfect weight and texture for watercolour journaling. Each Aqua journal is bound in a landscape format with six signatures so that the book lays flat when open. An elastic brush holder is positioned at the top of the book and is designed to hold a Connoisseur Kolinsky Sable Travel brush. The Aqua journal is fitted with our signature ribbon marker, elastic band closure and storage pocket in the back of the book. 8.1cm -by-13cm book.