GreenSandLedger is a handy foundry sidekick that helps you log, check, and tune green sand fast. Record key tests like moisture, active clay, GFN, LOI, compactability, permeability, and water added in clean forms. Track green strength with date, time, sample ID, sand temperature, and notes—all in one place. Use the blend tool to mix new and reclaimed sand to hit your target GFN and stay under LOI caps. Turn sieve data into AFS GFN in a tap, and match your target screen curve with smart blend tips. Get a quick guide for how much water to add for a target compactability. Convert permeability numbers to Darcy for “shop vs field” talk, and flip mass fractions into parts by weight for easy binder mixes. Simple screens, clear results, and ready-to-share logs keep your team on the same page every shift.