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Rosco Ros-1188 Roscolux Tough Frost Light Diffuser Sheet — main product image
Rosco

Rosco Ros-1188 Roscolux Tough Frost Light Diffuser Sheet

★★★★★4.7 (3 reviews)

Professional-grade 20x24" frost diffusion sheet that transforms harsh stage and studio lights into soft, even illumination.

$14.99*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Rosco Roscolux Tough Frost (Ros-1188) is a professional light diffusion sheet designed to transform the character of focused lighting instruments. When placed in front of an ellipsoidal or similar hard-edged fixture, it scatters the beam to produce a softer, broader wash of light — effectively turning a spot into a flood or scoop-like source. This makes it invaluable on film sets, television studios, and theatrical stages where controlling light quality is essential to the look of a production.

Measuring 20 x 24 inches, the sheet fits standard gel frames used in professional lighting and can be easily cut down for smaller fixtures. The "Tough" formulation is specifically engineered to endure the sustained heat output of stage lighting instruments, giving it a longer working life than standard frost gels. For lighting designers and gaffers who need reliable, repeatable diffusion without investing in bulkier softbox modifiers, the Rosco Tough Frost remains a go-to solution that delivers predictable results every time.

Specifications

Brand
Rosco
Model
Ros-1188
Product Type
Light Diffusion Sheet
Material
Light Diffusing Material (Tough Frost)
Sheet Size
20 x 24 inches
Use
Film, Television, Stage Lighting

Pros & Cons

👍 Pros

  • Effectively converts hard ellipsoidal light into soft, even flood-style illumination
  • Tough construction resists heat better than standard diffusion gels
  • Standard 20x24" size fits most professional gel frames without modification
  • Lightweight and easy to cut to custom sizes for different fixtures

👎 Cons

  • Single sheet format means frequent reordering for productions that use diffusion heavily
  • Reduces overall light output as it scatters the beam
  • Only available in one diffusion density — no lighter or heavier frost options in this product
  • 20x24" may be too small for larger fixture frames without overlapping multiple sheets

Frequently Asked Questions

Each sheet measures 20 x 24 inches, a standard size that fits most professional lighting gel frames and holders.
The Tough Frost material scatters and softens harsh light, converting focused ellipsoidal beams into broader, more even flood-like illumination while reducing some overall intensity.
Yes, the "Tough" designation means this diffusion material is engineered to withstand the heat generated by professional stage and studio lighting instruments better than standard frost gels.
Absolutely. The 20x24" sheet can be easily trimmed with scissors or a blade to fit any gel frame or fixture size you need.

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