On a frame saw, segment width is the kerf. Everything in that kerf becomes slurry, and slurry is the part of the block you bought and cannot sell. Choosing between a 3.0 mm and a 1.8 mm section is a yield decision before it is a tooling decision.
The arithmetic
A 1.2 mm reduction per cut, multiplied by the number of blades in the frame, on every block, adds up to slab area. Against a 3.0 mm segment, the 1.8 mm strip removes roughly 40% less material on the same pass. Whether that matters depends on what the stone is worth per square metre, which is why the thin section sells into high-value marble first and into granite later.
What you give up
A thinner segment has less matrix around each diamond and deflects more. It wants a frame in good alignment, steady blade tension, and coolant that reaches the cut. On a worn machine a 1.8 mm strip will wander, and the thickness variation on the slabs costs more than the kerf you saved.
How we quote it
Send the frame saw brand, blade diameter (we cover Φ350 to Φ2000), the stone, and the condition of the machine if you know it. Model P4D850-46, 500 pcs minimum. We also supply the 40 × 3.0 × 7.0 mm and 8 × 1.8 × 10 mm sections where the thin strip is not the right answer.