CRT Cheat Sheet 2026: One-Page Review of Must-Know Facts

What the CRT Credential Covers

CRT stands for Color Repair Technician, a certification governed by the Institute of Inspection Cleaning and Restoration Certification (IICRC). It addresses a narrow, specialized problem: carpet and other textiles that have lost color, faded, been stained by contamination or bleaching, or been improperly dyed. Specifically, the credential concerns color correction and repair of nylon and wool textiles, including restoring carpet shade, selecting dyeing procedures, and repairing improperly dyed fabrics.

If you are still orienting yourself on the basics, the explainers on what CRT is and what CRT stands for cover the naming and scope in more depth. This cheat sheet assumes you already know the acronym and want a compact review of the facts that matter on exam day.

The issuer describes the learning outcomes under three broad headings: color theory, practical application and hands-on techniques. The more detailed preparation curriculum breaks that into eleven topics, which are reviewed below. Treat those eleven topics as unweighted preparation subjects, not as an official eleven-section exam blueprint with published percentages.

Prerequisite and Course Route

CRT is not an entry-level credential. CCT or CCMT certification is required before CRT. Once that prerequisite is in place, the path is straightforward: complete approved CRT instruction, then take the examination. The full eligibility picture is laid out in the CRT requirements guide.

Two delivery routes exist:

• Live-stream: You attend the entire course remotely, then complete the exam through the IICRC Online Exam Portal.
• In-person: You attend the course at a physical location and take the written examination on the final course day.

The published CRT course is two days and 14 instructional hours, and that figure excludes examination time, lunch and breaks. Because the course is compact, you should arrive already comfortable with your CCT-level fundamentals. Review the CRT training overview to see how course formats differ.

Fees, Deadlines and Retest Rules at a Glance

The mechanics below are the facts candidates most often confuse. Memorize the distinctions, especially the difference between a completion window and an exam duration.

For a fuller cost picture including tuition and renewal, see the CRT certification cost breakdown, and for scheduling specifics, the CRT exam dates guide. The scoring side is covered in the CRT passing score article.

The 11 Preparation Topics in One Pass

Here is the full curriculum list in order. These are the topics named in the IICRC course description, and they are your master checklist.

1. History of color
2. Color theory
3. Natural and synthetic dyes
4. Dye methods
5. Types of dyes
6. Types of fibers
7. Carpet styles
8. Dye procedures
9. Fading
10. Color loss due to contamination or bleaching
11. Use of cleaning agents that may affect or remove color from carpet

Notice the logical arc. The first five topics build the science and chemistry of color and dye. Topics six and seven establish the material you are working on. Topics eight through eleven move into procedure and diagnosis. For a topic-by-topic walkthrough, the complete guide to all 11 content areas goes deeper than this one-page review.

Color Science Facts to Lock In

The issuer lists "color theory" as one of its broad learning outcomes, so expect this material to underpin the practical topics that follow. A common mistake is treating the history portion as trivia to skim. Treat it as context that explains why the dye and fiber topics work as they do.

Dyes, Fibers and Carpet Styles

Topics four through seven form the technical core. They answer three questions: how does dye get into a fiber, what kinds of dye exist, and what exactly are you dyeing?

Dye Methods and Types of Dyes (Domains 4 and 5)

Candidates should be able to distinguish between application methods and between the kinds of dye used in textile repair. Because the credential centers on nylon and wool, keep your mental model anchored to those two fibers when you study dye categories. A dye type that suits one fiber may behave differently on the other, and exam questions tend to reward that kind of fiber-aware reasoning.

Types of Fibers (Domain 6)

Carpet Styles (Domain 7)

Carpet construction affects how dye is applied and how a repair blends visually. A cut-and-loop texture, for instance, reflects light differently than a flat surface, which influences how a corrected area reads next to an untouched one. Review the construction styles covered in your course materials and connect each to its repair implications.

Dye Procedures and Color Loss Causes

The final four topics move from knowledge to diagnosis and action. This is where the credential's real-world value lives, and it is where scenario-style reasoning matters most.

Hands-On Vocabulary From Provider Courses

Some training providers describe CRT coursework in practical, hands-on terms. One provider course, for example, references dye kits, spot dyeing and room dyeing, shading and feathering, and bleach or chemical neutralization. These are useful working concepts, and they illustrate what "practical application" and "hands-on techniques" look like in the field.

Understanding the difference between spot dyeing and room dyeing, for instance, helps you reason about scale and blending in scenario questions. Likewise, understanding why feathering matters helps you picture how a repair disappears into surrounding carpet. If you want a structured approach to turning this material into recall, the CRT study guide walks through preparation in detail.

A Domain-Ordered Review Plan

Because the eleven topics build on one another, order your review to match that dependency chain rather than studying at random. Here is a compact four-week sequence tied to the actual curriculum.

Adjust the pacing to your calendar, especially if you are testing soon after a live-stream course. Remember that live-stream candidates must finish the exam within 45 days of the final course date, so build your review window backward from that deadline. When you are ready to measure yourself, take a timed run on the main practice test to see which topics need another pass. If you are unsure how demanding to expect the exam to be, read how hard the CRT exam is, and for outcome data, the CRT pass rate discussion.

Renewal, Master Pathway and Where CRT Fits

Keeping the Credential Current

Technician-level certifications require annual renewal and 14 continuing education credit hours every four years. Master and Inspector holders follow a separate rule of 14 hours every two years. Renewal charges vary with the number and type of credentials you hold, so a technician carrying several IICRC certifications will not pay the same as someone with a single one.

The Master Textile Cleaner Pathway

CRT is required for the Master Textile Cleaner pathway, but it is not sufficient by itself. Think of it as one necessary building block rather than the finish line. Some training providers use inconsistent wording about Master designations, but those descriptions do not override IICRC's own prerequisite and designation requirements. When in doubt, defer to the IICRC.

Career Context

CRT suits technicians who already work in carpet cleaning and restoration and want to add a high-skill repair service. Cleaning and restoration firms and carpet care businesses are the natural employers or clients for this skill. For a realistic view of opportunities, see the CRT jobs overview. To weigh earnings and return, the CRT salary guide and the analysis of whether CRT is worth it work through the numbers without relying on unverified figures.

Frequently Asked Questions