For the Glowforge Aura Craft Laser, identify the types of Proofgrade materials recommended for optimal results. Additionally, specify which colors of Proofgrade acrylic are explicitly not recommended for use with this machine.
Navigate to 'glowforge.com'. Click on 'Products' in the main navigation. On the Products page, click on 'Craft Lasers'. Scroll down the Glowforge Aura product page to find the 'Materials' or 'Specifications' section. Identify and list the recommended Proofgrade materials. Identify and list any specific Proofgrade acrylic colors that are not recommended for the Glowforge Aura.
State that recommended Proofgrade materials include Wood, Acrylic, Leather, Veneer, Paper, and Cardboard. Specify that clear, white, and blue Proofgrade acrylics are not recommended for use with the Glowforge Aura.