Ask for a handle modifier for suede or nubuck, not for “more fatliquor.” Nap and sheen are the tests.
Nap is a surface
Suede fails when oil sticks the nap or when the centre is dry and the surface is slick. Nonionic handle modifiers in the Esteem table are aimed at elegant handle and lightfast pastel work, added to an acidified dye bath or the main fatliquor.
Cationic products in that table are aimed at chrome suede lubrication and at top fatliquoring for a smooth handle. Using them as the only oil on a heavily retanned grain leather is a different trial.
Sheen and write
A gloss on suede can be desired. The multipurpose anionic emulsion is described as giving glossy sheen on suede and helping other fatliquors penetrate. That is a sheen tool, not a white-leather lightfastness tool.
Write the lighting test if the article is pastel. A fish-oil blend that is excellent for run and fluff can be the wrong pastel suede oil.
Dose stage
Ionic clashes are real. A cationic top belongs after the anionic main bath has exhausted, not mixed into it.
Milling and staking change nap more than the last percent of oil. Record them.
| Grade type on the table | Suede role | Typical miss |
|---|---|---|
| Nonionic handle modifier | Handle on suede and nubuck | Using it as the only deep softener |
| Cationic condensation product | Chrome suede and top handle | Adding it into a strong anionic bath |
| Multipurpose anionic | Sheen and wetting back | Expecting lightfast white |
| Dispersing fatliquor | Dyeing oil and levelness | Expecting nap |
Nap is cut fibre, not a coating
Suede and nubuck are grain or flesh surfaces that have been buffed so the fibre ends stand up. Handle, write, and sheen are properties of those ends and of the oil just beneath them. A main fatliquor designed to fill a full-grain cross-section will happily coat the ends. The leather feels soft in the centre and looks flat or greasy on the face.
A nonionic handle modifier does not rely on charge to exhaust. It can be added to an acidified dye bath or with the main fatliquor and still move. That is why the table positions it for elegant handle on suede, nubuck, and full grain, including lightfast pastel work, rather than as the only deep softener.
Sheen and lightfastness are different oils
A multipurpose anionic emulsion can wet back and add gloss on suede because the emulsion film lays some fibre ends. That is a sheen tool. A fish-oil or dark sulfited blend can give run and fluff and still yellow a pastel under the lamp the customer uses. Lightfastness is a chemical property of the oil, not a result of dosing a dark oil more carefully.
White and pastel suede therefore start from the grades whose notes say lightfast: the nonionic handle modifier, and the lightfast synthetic when penetration of the cross-section is the main job. A sheen grade is added only after that choice, and only if gloss is actually wanted.
When the nap is judged
Wet leather in the drum hides nap defects. Oil is still emulsified and the fibre ends are swollen. Milling and staking raise the nap and also move oil toward the surface. A trial judged before drying will accept oils that fail after the dry process the factory actually runs.
Keep the main anionic percentage fixed on the first handle-modifier trial. If both move, a better nap cannot be assigned to the modifier, and a greasy write cannot be assigned to the main oil. Record milling time. It often changes the face more than the last half percent of fatliquor.
How to Specify with Esteem
- Name suede, nubuck, or full grain.
- State the nap or sheen target and the shade, especially white.
- Say if the product is added in the exhausted dye bath or as a top.
- Keep the main anionic fatliquor percentage fixed on the first trial.
- Judge nap after drying and milling, not in the wet drum.
Esteem’s nonionic handle modifier and cationic fatliquor notes on fatliquors name suede, nubuck, and full grain.