Hand wash in warm water using a mild detergent or soap, be sure to rinse thoroughly and dry flat.
On occasion there can be very small imperfections found in the metallic paper they are minor and do not effect the strength of the paper.
It is normal for the metallic paper to crease and mark with wear, the intention is for the paper to become more like a foil. This is characteristic of the metallic paper, it is not a fault.
Made in Tuscany, with love.