Cyanotype is often described as a simple printing process, yet results don’t always meet expectations. Pale blues, uneven exposure or stains are common issues — especially when small details are overlooked.

1. Insufficient UV exposure
Weak sunlight or short exposure times result in pale prints. Increase exposure and ensure firm contact between negative and surface.

2. Incorrect chemical ratios
Inaccurate mixing leads to inconsistent results. Always measure carefully and mix fresh solutions.

3. Unsuitable paper
Highly sized or non-absorbent papers prevent proper emulsion absorption. Choose absorbent, acid-free paper.

4. Inadequate washing
Poor rinsing leaves chemical residue that can stain prints. Rinse thoroughly with clean water.

5. Coating in bright light
Strong light can pre-expose the emulsion. Coat materials under dim conditions.

Conclusion
Most cyanotype failures are easy to prevent. With attention to light, ratios and materials, consistent deep blue prints are well within reach.