All You Need To Know About Dye Penetrant Fluorescent – Water Washable Level 2 And 3

Dye Penetrant Fluorescent | All You Need To Know About Dye Penetrant Fluorescent – Water Washable Level 2 And 3 | Penetrant inspection is a widely used method when it comes to non-destructive testing. One of the most highly demanded variations of this method is the dye penetrant inspection. To understand these concepts further, let’s first take a look at what dye penetrant fluorescent system is. 

But before moving on to this, we need to take a look at what is non-destructive testing (NDT). It is the method through which businesses assess various elements, such as the properties of materials, structures, and more. It is essential to verify whether these elements have any defects in them or not. To assist in carrying out the NDT, such as dye penetrant inspection, the right kind of NDT supplies are required. 

What Is A Fluorescent Dye Penetrant System? 

The first question that arises is what a dye penetrant fluorescent system is. Essentially, it is a type of dye penetrant inspection that makes use of fluorescent dyes to identify and defects in materials. The dye is applied to the non-porous material through which this can be identified accurately. The method of penetration system is usually inexpensive as compared to others available. 

Steps Involved in A Dye Penetrant System

There are a series of steps involved when it comes to fluorescent dye penetrant inspection. Let’s take a look at what these are. 

Initial Cleaning

The first thing that is done is the cleaning of the material that is to undergo this process. The cleaning allows for all the contamination to be removed, such as oil or dirt. This helps in making sure that the inspection is made accurately. 

Application of Penetrant

Next, the penetrant is applied. In this case, a fluorescent dye is applied to the surface of the material that you wish to inspect. Typically, a specific time is allotted for this process so that the penetrant seeps into all the defects of the material. Usually, this takes about thirty minutes to happen. 

Removal of Excess Penetrant

Once the adequate time is given for the penetrant to seep into all the cracks and defects, fluorescent penetrant is removed from the exterior of the material. 

Drying of Surface

Following the removal of excess penetrant the surface is dried usually in an air circulating drying oven. Care is taken to only dry any residual surface water and not dry the penetrant which may be present in defects.

Application of Developer

After the removal of all of the excessive penetrant, a developer is applied so that the inspection can be done better as the flaws become clearer with this. 


For fluorescent dye penetrant system, the use of ultraviolet radiation is used to inspect the extent to which the material has defects. The fluorescent dye glows and showcases all the faults in the material.

Final Cleaning

Once the inspection is complete, the material is cleaned so that it can move on to the next phase. 

Hiring Professionals For Dye Penetrant Fluorescent 

When it comes to getting a dye fluorescent penetrant inspection, it is essential to have professionals on board. With the right skills and experience, this process will be easier and more accurately administered. Craven NDT offers effective penetrant testing for all industries. They follow a range of penetrant testing standards to meet every industry’s requirements. 

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