Diamond Lattice: a framed lattice panel for straight-cut practice

Cut pattern for Diamond Lattice: 32 pieces of glass separated by lead lines on a square panel. — The cut pattern exactly as the generator draws it, here at 14 in square: 32 pieces in 4 glass colors, the narrowest piece 0.8 in across and the tightest interior angle 45 degrees, both clear of the 0.375 in and 30 degree limits every pattern on this site is checked against. The panel covers 196 sq in and the glass list adds up to 225 sq in once the usual waste allowance is included.

Diamond Lattice frames a checkerboard of diagonal diamonds inside two borders, an outer dark band and a slim inner accent band. Thirty-two pieces total, every one of them a straight-edged diamond or triangle, so the whole panel can be cut with a straightedge and a scoring wheel.

Panel size runs from 8 in to 24 in. Every diamond and border piece holds a wide angle margin at every size in range, which is why this pattern is rated beginner.

The download includes a full-size tiled outline for transfer, a numbered piece map, a color reference sheet, a cutting-margin pattern for copper foil or lead came, and a glass and supply list scaled to your chosen size.

A pattern for learning the straight score

Thirty-two straight edged pieces and not one curve is exactly what a new cutter needs: the score is the fundamental skill, and a lattice gives you dozens of identical opportunities to feel what a correct score sounds like. A consistent hiss, no visible white dust, one pass only. Panels where every piece is straight also break cleanly with running pliers, so the failure rate stays low while the hand is learning.

Keeping the lattice honest

The whole effect depends on the diagonals lining up across the panel, which means grinding to the line rather than near it. Check every fourth piece against the printed pattern rather than trusting the accumulation, and dry lay each completed row. A lattice that drifts by half a millimetre per piece is visibly crooked by the twentieth.

Glass choices

The two borders do the framing, so keep them darker than the field: an outer dark band and a slim accent band read as a frame only if they have more weight than what they surround. For the checkerboard itself, two glasses with a clear difference in value will hold the diamond pattern even at a distance.

Buying the glass

The glass list in the download gives square inches per color for the size you chose. Buy more than that: between offcuts, a score that runs off line and the occasional piece that breaks on the grinder, most cutters add 20 to 25 percent, and more when a color has strong directional streaking that has to run the same way across several pieces. Glass from a second sheet rarely matches the first, so buying short is the expensive mistake.

Bench setup, tools, and working dimensions

Work on a flat board at least 4 in larger than the selected panel in both directions. For an 8 in panel, a 12 in by 12 in board is enough. For a 24 in panel, use at least 28 in by 28 in so the straightedge, pins, and border checks do not hang off the edge. Tape the full size pattern down first, then cover it with clear film or a thin transparent sheet so paper fibers and glue do not move the parts.

Use a carbide scoring wheel, a cork backed steel straightedge, running pliers, grozing pliers, a fine permanent marker, pattern shears if you cut templates, a grinder with a fresh medium bit, push pins or horseshoe nails, and a square. Add a ruler marked in 1 mm or 1/32 in divisions. A small error is easy to miss on one diamond, but it is easy to measure when checked against a printed grid line.

Keep the score line 1/16 in to 1/8 in away from the straightedge edge, depending on the cutter head offset.
Leave 1/16 in clearance around each foiled piece for solder, unless your printed cutting margin states otherwise.
For lead came work, check the heart of the came against the margin sheet before cutting all border pieces.
Grind with water flow visible at the bit, not with a dry sound or glass powder on the edge.
Clean marker lines off each piece before foiling, because ink under foil weakens adhesion.

Cutting and assembly procedure

Start with the border strips and corner triangles, then cut the field diamonds. This order gives you fixed outside references before the repeated lattice pieces are fitted. Mark each piece number on the glass before separating it from the sheet. If the glass has a grain, draw a small arrow on every field piece and keep all arrows in the same direction during cutting.

Score from the wide end toward the narrow end when cutting triangles. Keep the cutter upright, use one continuous pass, and stop at the far edge without backing up. Break long straight scores with running pliers centered on the score, then use grozing pliers only for small nibs. Do not use grozing pliers to force a full diagonal break, because the pressure often starts a shell fracture at the corner.

Dry fit in stages. Pin the outer border first and check it with a square at two corners. Add the accent band next. Then set the diamonds in rows, not as isolated single pieces. After every row, place a straightedge along the diagonal seam line and look for gaps wider than 1/32 in. Correct the row while it is loose. Once foil, came, or solder locks the row, the correction becomes much slower.

If you use copper foil, wrap all field pieces before the border only if the borders are already cut and checked. Burnish the foil flat on both faces and on the edge. For a practice panel, spend about 20 to 30 seconds burnishing each diamond. That is enough time to find lifted corners, overlaps, or foil that has crept off center.

Figures to use while checking the panel

Check point	Practical figure	What to do if it is outside the figure
Single piece size error	Keep under 1/32 in on any straight edge.	Grind to the line if the piece is large, recut if it is small and opens a visible seam.
Row drift	Keep total drift under 1/16 in across a row.	Remove the last few pieces and redistribute the gaps before adding more pieces.
Corner squareness	Both diagonals of the outside rectangle should differ by no more than 1/8 in on a 24 in panel.	Re pin the border before soldering or cementing.
Grinding time	About 5 to 15 seconds per small correction.	If it takes longer, the piece was cut too large and may heat or chip.
Foil overlap at ends	About 1/8 in overlap is enough.	Trim bulky overlaps at sharp points before burnishing.

Frequent mistakes, recovery, and special cases

A white, gritty score usually means excess pressure. Do not rescore the same line. Break the piece if the score is continuous, then reduce pressure on the next piece. If the break wanders, save the glass for a smaller triangle if the color and direction still match the plan.

A chipped point on a diamond can often be recovered if the chip is under the foil width or inside the came channel. If the missing glass reaches into the visible face by more than about 1/16 in, recut the piece. Filling a sharp missing point with solder makes a bright lump that interrupts the lattice line.

If a border strip is slightly short, do not stretch the gap along one joint. Move the strip to the opposite side and test whether the error is less visible there, or recut it. Border errors are more obvious than field errors because the eye uses the frame to judge the whole panel.

For textured glass, score the smooth side when possible. If both sides are uneven, use a narrow oil feed cutter only if it rolls cleanly without bouncing. For mirror or flashed glass, make test scores on scrap first, because the coated side may require a different marking method and more careful cleaning.

For panels near 24 in, support the finished work during soldering or cementing so it stays flat. A thin panel can sag if one edge overhangs the bench. For smaller panels near 8 in, the main risk is not sagging but excess solder or bulky foil at the points, so keep the seams even and avoid building up the diamond intersections. For general questions about transferring, cutting, and scaling patterns, see the FAQ.