Petri dish resin alcohol ink test: brightest colors and best sinker white (Part 1)

In this petri dish resin alcohol ink test, I compare letsresin, About, DecorRom, and GR in exactly the same workflow. I focus on color intensity, sinker white behavior, and timing to see which combinations really create strong petri cells.

What is the petri dish effect?

The petri dish effect appears when sinker white pushes the alcohol ink down through partially cured resin. The final look depends on resin viscosity, timing, and sinker strength.

Inks used in this test

I tested four brands and documented both sinkers and color inks.

Color ink sets per brand

Timing: the key factor

Timing changed everything. At 45 minutes, some sinkers dropped too deep. Around 1 hour + extra rest after sinker gave more stable cells.

Color results: vivid vs muted

DecorRom produced the most vivid purple and blue-green combinations. letsresin looked deeper and more muted. About produced elegant structure with balanced saturation.

Sinker white comparison

letsresin C-Deeper and About Deep White were most predictable in this setup. DecorRom worked with careful timing. GR needed thick resin; too early and it pushed color down without top cells.

Practical tips

• Wait until resin is clearly thicker before adding sinker white.
• Test one timing variable at a time.
• Use fewer colors first, then increase complexity.

Conclusion and Part 2 preview

This petri dish resin alcohol ink comparison shows that brand + timing define the final look. In Part 2, I repeat the same brands with optimized timing to show how much the results improve.

Further reading

• Epoxy colors: all dyes explained
• Alcohol ink for epoxy comparison