Saffron color purity. Unfortunately, there is nothing to stop saffron producers from making their saffron with only half true stigmas and the other half made up of the yellow styles.
different types of iranian saffron & how to use saffron
There’s also nothing to prevent them from dying these yellow styles red to give the appearance of quality saffron.
Now if you come across saffron that seems too good to be true – it’s all red and very inexpensive – you’re probably dealing with inferior saffron.
Remember to look for the ISO certification, which all quality saffron will have. But if you bring it home and you’re still not so sure, here’s a quick test. Saffron color purity
Saffron color purity , When you first put quality saffron in liquid, the liquid will turn a slightly pale yellow, and over time will turn the liquid a stronger and more vibrant color.
Bunch Saffron
Bunch Saffron has different names, such as Dasteh Saffron or Dokhtar Pich Saffron (Dochtar Pitsch Saffron, or Dokhtar Saffron). Dasteh Saffron is the complete stigma (filament) of saffron in bundles. In other words, it contains the stigma with the whole style.
It contains red-colored parts as well as orange, yellow, and white parts. Its coloring strength is relatively low compared to the Mancha and All Red types. Although the style of the saffron has a lower value compared to the red parts, many customers prefer to buy the whole thread rather than the red parts alone. Saffron color purity
Saffron Color Purity and Quality
The color purity of saffron is one of the most important indicators of its quality. It is mainly determined by the natural pigment crocin, a carotenoid compound responsible for saffron’s golden-yellow color when dissolved in water.
Measuring Saffron Color Strength (Crocin)
International saffron quality is evaluated according to ISO 3632 standards, which measure three main compounds:
| Compound | Role in Quality |
|---|---|
| Crocin | Color strength |
| Safranal | Aroma |
| Picrocrocin | Taste and bitterness |
Color strength is expressed as an A440 value (absorbance at 440 nm).
ISO 3632 Color Categories
| Category | Crocin Color Strength (A440) | Quality |
|---|---|---|
| Category I | ≥ 200 | Premium quality |
| Category II | 170–199 | High quality |
| Category III | 120–169 | Standard quality |
Premium Iranian Super Negin saffron often achieves ISO Category I when properly harvested and processed.
Characteristics of Pure High-Quality Saffron
A pure saffron sample usually has:
✅ Deep red stigmas
✅ No yellow or white parts (especially in Sargol/Negin grades)
✅ Strong natural aroma
✅ Slow release of golden-yellow color in water
✅ No artificial coloring
✅ Uniform threads
Simple Home Tests (Not Laboratory Tests)
1. Cold Water Test
- Place a few saffron threads in warm water.
- Pure saffron releases color gradually.
- The threads remain reddish after releasing color.
Adulterated saffron may release an immediate bright red color due to artificial dyes.
2. Appearance Test
Pure saffron:
- Has trumpet-shaped stigma ends
- Has natural irregularity
- Is not perfectly uniform like synthetic fibers
3. Aroma Test
Authentic saffron has a combination of:
- Floral notes
- Honey-like aroma
- Slight hay-like scent
A strong chemical smell may indicate poor quality or adulteration.
Factors Affecting Saffron Color
- Saffron variety
- Growing region
- Harvest timing
- Drying temperature
- Storage conditions
- Age of saffron
Best Storage for Maintaining Color
To preserve crocin:
- Store in airtight containers
- Keep away from light
- Avoid humidity
- Store at cool temperatures
- Do not expose to strong odors
Which Saffron Has the Highest Color Purity?
Generally, premium grades include:
- Iranian Super Negin – excellent crocin strength and consistency
- Iranian Negin/Sargol – very high coloring ability
- Kashmiri Mongra – strong color and aroma but limited supply
- Spanish Coupe – high-quality specialty saffron
For export markets, buyers usually request an ISO 3632 laboratory certificate showing crocin, safranal, and picrocrocin values to verify purity and quality.
