Alder vs Poplar for Laser Engraving: Which One Should You Buy?

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Alder vs Poplar for Laser Engraving: The Short Answer

For signs, plaques, ornaments, crafts and awards, alder is the clearer pick from the material on hand, because its listings state the blank, the thickness and the finish. Poplar remains an open question in this guide: without a poplar listing, there is no stated thickness, size range or finish to compare, so a poplar choice should rest on its own listing, not on alder facts carried across. That distinction matters because a blank that is thinner, thicker or finished differently can need different settings and different hanging, even when the project name sounds the same.

What the Alder Listings Actually State

The three alder listings cover different shapes, and that shape often decides the project more than the wood name does. Read each listing for its own size and finish, and do not carry a figure from one listing to another.

Cherokee Wood Products alder board. The listing states a board of 1/2” x 5” x 12”, described as alder solid hardwood, unfinished, for crafts, woodworking and laser engraving. The spec table repeats the thickness as 1/2” and lists the number of items as 1. It is the plainest blank of the three: no border, no hanging fittings and no finish are stated, so plan your own sanding, finishing and mounting around that unfinished surface.

Genuine Red Alder plaque blank. The listing states a red alder plaque blank, 3/4 inch thick, in a 7×9 inch size, with a size range of 5×7, 7×9, 9×12, 10.5×13, and 12×15 inches. The maker lists an option of a 1 inch dark walnut wood border, a smooth wood surface ideal for dark engraving, painting, staining, and other personalization techniques, and a bevel that is 1/2 inch in width. The back includes two keyholes, allowing easy hanging in either portrait or landscape orientation. The spec table lists the product dimensions as 9.0 inches x 7.0 inches x 0.75 inches and the item weight as 1.0 pounds.

The Hardwood Edge alder planks, 8-pack. The listing states thin-sawn, 100% pure hardwood planks, described as 1/4 X 6 1/2 X 15 inches, with the title also giving 1/4’’ (6mm). The maker states the planks are kiln dried, precision sliced, and sanded to a smooth finish, with no chemicals used in growing and harvesting, and that the wood is pure hardwood with natural alder grain and color, not a veneer on plywood. Alder is described as low density with a subtle, straight grain, in a light tan to reddish brown color that will darken and redden over time, and as easy to engrave and cut. The stated uses cover crafts, gifts, wedding decor, personalized signs, holiday ornaments, company awards, and use in STEM/STEAM, Industrial Arts, CAD and Engineering classes.

What to Check on a Poplar Listing Before You Buy

Use this checklist on any poplar listing, and write Not stated for any point the listing leaves out:

• Size and thickness: does the listing state the full size and the thickness, as the alder listings do, or only a project name?
• Construction: is it solid wood, or a veneer on plywood? The Hardwood Edge alder listing states pure hardwood, not a veneer on plywood, and a poplar listing should be held to the same clarity.
• Grain and color: does the listing describe the grain and the color, and does it say whether the color changes over time, as the alder plank listing does?
• Finish: is the surface unfinished, sanded to a smooth finish, or finished in another stated way?
• Hanging and display: does it include fittings such as keyholes, and does it state portrait or landscape hanging, as the plaque listing does?
• Stated uses: which projects does the maker list for that blank, and do those uses match the project you have in mind?

Do not borrow an alder size, thickness or finish to fill a gap in a poplar listing.

Choosing by Project

Match the project to the stated use, not to the wood name alone:

• Personalized signs: the Hardwood Edge planks list personalized signs among their uses, and the Cherokee board lists crafts and woodworking. The plank pack suits a run of small signs, while the single board suits one small sign.
• Plaques, awards and memorials: the red alder plaque blank is the pick here, with its award and craft plaque description, its memorial use, its border option and its two keyholes for hanging.
• Ornaments, gifts and wedding decor: the Hardwood Edge planks list holiday ornaments, gifts and wedding decor, and the thin profile suits small decorative pieces.
• Company awards: both the plaque blank and the planks list awards among their uses, so choose by shape: a plaque for a single presentation piece, planks for a batch.
• Crafts and classroom-style projects: the planks list crafts and use in STEM/STEAM, Industrial Arts, CAD and Engineering classes, and the Cherokee board lists crafts and woodworking.

Safety and Finishing Notes

Never laser PVC, vinyl, PVC-based faux leather, polycarbonate or ABS. Those materials can release harmful fumes and damage the machine, and they have no place in a wood-blank comparison. Ventilate the workspace so smoke leaves the room, keep a suitable extinguisher within reach, and never leave a running job unattended.

Use eyewear only if its listing states an optical density and a wavelength range that matches your laser. None of the three alder listings here states an optical density or a wavelength range, so this guide makes no eyewear claim for them, and tinted acrylic or orange shields without a stated optical density and wavelength range are not protection. Check the eyewear listing itself, not the wood listing, before you rely on it.

On finishing, the plaque listing states a smooth surface ideal for dark engraving, painting and staining, and the plank listing states a sanded smooth finish. The plank listing also states that alder color will darken and redden over time, so allow for that change when you choose a finish and when you photograph a piece for a customer. The Cherokee board is stated as unfinished, so its finish is yours to choose.

FAQ: lasers and CNC

Can alder blanks handle signs and awards?

Yes, on the stated uses in these listings. The Hardwood Edge planks list personalized signs and company awards, and the red alder plaque blank is described as an award and craft plaque with memorial uses.

What sizes do the alder listings offer?

The Cherokee board is stated as 1/2” x 5” x 12”. The plaque blank is stated as 3/4 inch thick in a 7×9 inch size, with a size range of 5×7, 7×9, 9×12, 10.5×13, and 12×15 inches. The Hardwood Edge planks are stated as 1/4 X 6 1/2 X 15 inches in a pack of 8. No poplar sizes are stated in the listings supplied here.

Does alder darken over time?

The Hardwood Edge listing states that its alder is light tan to reddish brown and will darken and redden over time. That statement covers that listing; do not carry it to a poplar listing unless that listing states its own color change.

What should I verify on a poplar listing before ordering?

Verify the full size and thickness, whether it is solid wood or a veneer on plywood, the grain and color description, the finish, any hanging fittings, and the projects the maker lists for it. Mark any point the listing leaves out as Not stated, and do not fill it in from an alder figure.

Can I paint or stain these alder blanks?

The plaque listing states a smooth surface ideal for dark engraving, painting, staining, and other personalization techniques, and the plank listing states a sanded smooth finish. The Cherokee board is stated as unfinished, so plan its finish yourself.

Related: the basswood vs cherry for laser engraving, poplar vs birch for laser engraving and alder vs basswood for laser engraving guides, and materials you should never laser cut. Also see our what materials a laser engraver can cut guide.