This MG Chemicals 418 Positive Developer is used to dissolve the light-exposed areas during the photofabrication of an MG Chemicals 600 series positive presensitized copper clad board (not included). It comes in a 500 ml (17 oz) bottle, and the concentrated liquid is to be diluted using one part developer to ten parts water. For best results, the developer should be used in conjunction with MG Chemicals 416-S Foam Brush (not included). This positive developer liquid is Restriction of Hazardous Substances (RoHS) and California Air Resources Board (CARB) compliant. Contains sodium hydroxide; protective gloves, clothing, and eye protection must be worn.

MG Chemicals manufactures chemical products for the electronics industry. The company, founded in 1955 and headquartered in Surrey, BC, Canada, meets International Organization for Standardization (ISO) standard 9001.