A release member-integrated image forming sheet that can form a high quality image and has good manufacturing suitability, a release member-integrated image sheet, an image sheet, a method for manufacturing an image sheet, a decorative product having a high quality image, and a method for manufacturing a decorative product that can form a high quality image and has good manufacturing suitability. An image forming sheet is integrated with a release member, the image forming sheet can be separated from the release member, the image forming sheet includes an image layer before image formation, a stable peeling force when the image forming sheet is separated from the release member under conditions of a temperature of 25 C. and an angle of 30 is 1,000 mN/cm or less, and the dynamic coefficient of friction between the front and back surfaces of the release member is 0.3 or more and 0.9 or less.

A heat-transfer board customization device is provided. The device is designed to enable users to apply custom designs to sports boards such as skateboards, snowboards, surfboards, and similar boards. The device comprises a board, a heat transfer sheet, and a drawing utensil. The transfer sheet can be applied to the board and heated to transfer a design onto the board's surface. The sheet may be pre-printed with a design, have an outlined design for users to further customize, or may be blank for custom drawing. Drawing utensils, including paint pens or markers, are compatible with the transfer sheets, allowing further customization. The invention also includes several methods for using the device, involving steps of designing on the transfer sheet, applying heat to the sheet after placing the sheet on the board, and transferring the design onto the board.