Hypo Check — a solution for checking the effectiveness of the fixative
Just a few drops—and you can immediately tell whether you can still use the hairspray or if it's time to replace it.
About the Hypo Check Test
Hypo Check is a ready-to-use test solution that allows you to instantly and accurately determine the suitability of a developer. It is suitable for rapid testing of any fixer: brand-name or its homemade equivalent, neutral, acidic, accelerated, or fast—whether based on sodium thiosulfate or ammonium thiosulfate. It is sold in a bottle with a dropper cap holding approximately 10 ml, which is sufficient for an average of 30–40 tests, and retains its properties for several years.
How to Use
- 1Pour a small amount (10–20 ml) of the fixative you want to test into any clear container.
- 2Add a few drops (3–5) of Hypo Check test solution from the dropper bottle.
- 3If the adhesive is still clear, it hasn't dried out, and you can continue to use it.
- 4If the solution has become cloudy but clears up again after a gentle shake, the fixative is nearly depleted.
- 5If the solution has become cloudy and remains cloudy after shaking, the fixative is completely depleted and can no longer be used.
Pros
- Versatile—suitable for any type of fastener
- The result is visible immediately, without the need for laboratory testing
- One vial is good for dozens of tests
- It stays fresh on the shelf for a long time
Cons
- This is a ready-made, store-bought reagent—the manufacturer does not disclose its composition, and it cannot be prepared at home using a proven recipe
- It provides only a qualitative assessment (“serviceable / borderline / worn out”), rather than the exact remaining life of the films