Reduction by volume
Convert a percent reduction into clear ounces per quart, with finish-specific caps and conservative rounding.
Offline Android calculator for HVLP finishing
The exact HVLP thinning ratio, tip, and ounces, in three taps.
SprayMix turns a finish, cup reading, gun setup, and piece size into one bench-ready result: reducer per quart, target viscosity, tip size, and total mixed ounces.
Works without signal
No account or analytics
No ads or subscriptions
Conversion varnish example
In band
Reducer per quart
6.5 oz
Ford-4 read 35 sec at 62 F. Rounded up for a safer mix.
1.5 mm
Tip range
220 oz
Total mixed
Includes reducer and catalyst. Finish before additives is about 168 oz.
Too thick
Target
Too thin
1Pick the finish and cup reading.
2Pick the gun and temperature.
3Enter the piece and coats.
Bench-ready screens
The Play listing preview assets show the same core flows: one-card mix guidance, cup conversion, coverage planning, pot-life timing, and offline use.
Built for the spray bench
SprayMix connects the calculations finishers normally do across product sheets, cup charts, and coverage notes.
Cup conversion
Convert Ford and Zahn cup readings through centistokes so the target band stays tied to the same math.
Tip and coverage
Match reduced viscosity to a tip range, then estimate total mixed ounces from area, coats, solids, and HVLP transfer efficiency.
Offline-first by design
The Android app is built for shops and booths where a network connection may not be available.
Local app data
Jobs, favorites, settings, cached results, accepted terms, and the Pro entitlement flag are stored on the device in local SQLite or app settings storage.
No tracking stack
SprayMix has no account, no analytics, no ad SDK, and no Anvilfield cloud sync.
Purchases through Google Play
The optional one-time Pro purchase is handled by Google Play Billing. SprayMix stores only the local unlock state needed to keep Pro available.
User-controlled exports
PDF mix sheets and share exports happen only when you start them. Data goes to the destination you choose from Android sharing or file tools.
Support
For app help, purchase questions, or privacy requests, contact Anvilfield support.
Email support
- Include your device model and Android version.
- For calculation questions, include the finish, cup type, reading, temperature, and piece size.
- Do not send payment card details. Purchases are handled by Google Play.
Common help topics
- Restore Pro from the app if Google Play shows the purchase on the same account.
- Timer notifications are optional local reminders and can be changed in Android settings.
- Deleting app data removes local jobs and settings from the device.
- Exported PDFs or shared files must be managed in the place where you saved or sent them.
Quick answers
How much do I thin lacquer for HVLP?
Often 10 to 25 percent, but the right amount depends on the finish, temperature, cup reading, and gun setup. SprayMix converts the estimate into ounces per quart.
How do I convert Zahn 2 to Ford 4?
Convert the source cup reading to centistokes, then solve the target cup equation. SprayMix does that live inside the app.
How many ounces should I mix for a kitchen?
SprayMix estimates volume from square footage, solids, coat count, dry-film target, and HVLP transfer efficiency, then rounds up so you do not run short mid-coat.