You can obtain information on the plywood's specifications. The stamps will indicate what type of adhesive was used to make it so that you know whether it can be used outside. It will also indicate the quality of the wood facing.
Often it is known as the "mill stamp" which describes the origin or place of manufacture, the grade stamp (a,b,c or d depending on quality) and often the number of ply's or layers in the plywood.
To determine if plywood is pressure treated, look for a stamp or label indicating that it has been treated with preservatives. Pressure treated plywood is typically labeled with a stamp that includes information about the treatment process and chemicals used. You can also check the color of the plywood - pressure treated plywood is usually a greenish-brown color due to the chemicals used in the treatment process.
How much? what kind of plywood floor? Why do you need to do this??
They burned down stamp warehouses and quit reading newspapers.
A kind of plywood that can be formed or shaped.
One way to tell if plywood is treated is by looking for a stamp or label indicating that it has been treated with chemicals for protection against moisture, rot, or insects. Additionally, treated plywood may have a greenish tint or a distinct odor from the chemicals used in the treatment process.
For roofing, it is recommended to use exterior-grade plywood that is at least 5/8 inch thick. This type of plywood is designed to withstand weather elements and provide a sturdy base for the roof.
Plywood Grade Stamps (back of panel)The span rating indicates the maximum inches between supports that the panel may be applied. If there are two numbers, the first refers to roof applications, the second to floor applications.The exposure durability classification defines whether the panel should be used for interior or exterior applications:Exterior panels have a fully waterproof bond and are designed for applications subject to permanent exposure to the weather or moisture.Exposure 1 panels are designed for protected construction and industrial applications and can be exposed to the elements for a short time, but not permanently.Exposure 2 panels are intended for protected construction and industrial applications where the potential for conditions of high humidity and water leakage exist.Interior panels are manufactured with an interior grade glue and are intended for interior applications only.The thickness of the panel is also included on the stamp. Plywood is sized 1/32" under its called size. Hence, 1/2" plywood measures 15/32".
a santa Claus stamp
For a subfloor, it is recommended to use a high-quality plywood such as CDX or OSB. These types of plywood are strong and durable, making them suitable for supporting the weight of flooring materials and providing a stable base for the finished floor.
You get plywood by slicing regular wood into thin layers, and then sticking these layers on top of each other with the grain of one layer running across the grain of the next layer. So plywood, isn't a wood as such, but a wood product, much like particleboard.
The adolf hitler stamp is worth about roughly 1,350 in this era. you are a very lucky to have this one of a kind stamp.