Safety thick color veneer large 450x300x5.5Safety thick color veneer large 450x300x5. 5 This is a safe plywood that uses adhesives that are completely formaldehyde free. The thick surface allows the original feel of woodblock prints to be fully expressed. Harmful substances formaldehyde "zero" for children's health. Formaldehyde is considered to be one of the causes of "sick house syndrome" in the building materials market, and is being considered for legislation in the Diet. In consideration