Engraving .063 (14 Ga.) Aluminium Blanks - Beyond the Manual

I’m having trouble finding the correct settings to use to engrave some metal blanks I have. They should be fine to work with, but it’s like the laser doesn’t know it is there. I can put any other material in its place (it appears) and it will engrave it fine. I tried full power, 70%, 30% and different speeds. So far, no luck. Any advice would be welcome!

300 Pieces Metal Engraving Blanks Multipurpose Aluminum Sheet Aluminum Business Card Blanks for CNC Engraver Laser Engraving DIY Cards, Thickness 0.21 mm/ 0.01 inch (Multicolor) : Arts, Crafts & Sewing

Engraving Plates Brushed Finish Aluminum

Blank anodized aluminum engraving disc 2 inch Round stamping used to make ID tags, dog tag, and brass pendant and nameplate tags. Round disc engraving

Round Anodized Aluminum Blank Engraving Disc 2 Inches

Engraving Plates Anodized Finish Aluminum

Raw aluminum blanks -- Can be further finished for an even better look. - Perfect for stamping, etching, and engraving. - Thickness: 14 gauge (.063 /

25 Pk - 1 Round Stamping Blanks - 14 Gauge (.063) - Aluminum Circle Tags

Laser Engraving Blanks — ProFab Northwest LLC

Question: Are there other unsafe materials besides green-flame chlorine, what about reflective metals? - Beyond the Manual - Glowforge Owners Forum

300 Pieces Metal Engraving Blanks Multipurpose Aluminum Sheet Aluminum Business Card Blanks for CNC Engraver Laser Engraving DIY Cards, Thickness 0.21 mm/ 0.01 inch (Multicolor) : Arts, Crafts & Sewing

Anodized Aluminum Business Cards, Laser Engraved, 0.45mm

Metal Etching Stamp

Marspark 300 Pieces Metal Engraving Blanks Multipurpose Aluminum Sheet Aluminum Business Card Blanks for CNC Engraver Laser Engraving DIY Cards Thickness 0.21 mm/ 0.01 inch (Black)

14 Gauge Aluminum Sheet Metal 6x 6 for Hand Stamped DIY Jewelry Making, Cutting Blanks, Practice Metal From Beaducation SH128