META-IST = Indirect Surface Testing

   

... for indirect surface testing

META-IST is a two-component resin based on methyl methacrylate and consists of a powder and a liquid component. It can be supplied in yellow and black.
 

Why using META-IST?

• The sample is too large or heavy for testing by a laboratory
• The sample must be tested without being destroyed
• The area to examined is difficult to access
• For measuring of wear
• To measure initial samples and prototypes

META-IST enables you

• To take impressions for indirect surface testing
• To preserve and archive the condition of surfaces
• To create negative molds with silicone or plaster
• To re-create positive molds by using the double-mold procedure (To do so, META-IST can be ideally used in combination with Provil Novo silicones)

Application
Depending on the required consistency and general requirements, the material can be mixed at a ratio of 1:1 up to 3:1 (powder/liquid). Once it has been mixed, META-IST can be poured for approx. 2 minutes, and afterward, it is still kneadable for approx. 30 seconds. META-IST takes approx. 5 minutes to cure. This allows sufficient time to apply the material in order to make a mold and to make a cast of areas that are difficult to get to on vertical objects and for work that is performed overhead. When taking impressions of vertical or overhead surfaces, it is advisable to pour META-IST onto a PE or META-TRANSFILM(coming soon). As soon as the material has thickened, it is pressed onto the surface from which the impression is to be taken and then fixated.

Practical information

• Impressions of larger areas should be taken by applying several layers to keep the polymerization temperature low and hence prevent pores from forming within the impression material
• Modeling a handle makes it easier to remove the impression from the original
• Impressions should have a minimum thickness of 5 mm to prevent even marginal distortion when the impression is removed
• Complicated geometric shapes should be pre-treated with a conventional silicone or Teflon spray (please observe the processing instructions of the respective manufacturers).

Advantages

• Impression accuracy1 μm
• Dimensionally stable
• Can be detached easily
• Can be mixed at different ratios
• Impressions can be analyzed with roughness measurement devices or non-contact measuring methods

Precision impressions with META-IST and the Provil novo series impression silicones.

Each sample as detailed as the original

Impression taking is an important method for the inspection of surfaces. To achieve a high-quality result, auxiliary materials are necessary which represent the surface structure to be examined with high precision. Depending on the processing method and the level of accuracy required, we recommend using the 2-component resin META-IST and the Provil Novo silicones.  With an impression accuracy of < 0.1μm, each impression is as detailed as the original!

 Precision impressions are used in many fields and applica- tion situation such as, e.g.: 

• Wear assessment
• In-situ metallography
• Mould taking for restoration and mineralogical examination
• Reconstruction of damage incidents
• Forensic examinations
• Optimisation of processing technologies 

Designated use is the taking of impressions for the inspection and measurement of surface structures where high precision is required.

REASONS WHY IMPRESSIONS ARE TAKEN 

• Sample is too large or too heavy for a lab inspection
• Testing must be non-destructive
• Area to be examined is hard to access with measuring instruments
• Wear documentation
• Measuring of initial samples and prototypes

 Surface inspection – the suitable product for every impression technique. This makes precision impressions simple, easy and safe!

Identification of micro-fissures with in-situ metallography

Image 1 analysis of scratches on a key	Image 2 shows a magnification of 200x	Image 3 shows a magnification of 200x of the impression with Provil Novo

META-IST Indirect surface inspection

The flexibility when mixing the components guarantees both the pouring in a mold and the impression at hard to access places, verticals, as well as working overhead.

2-component polymer

META-IST  The two-component polymer consists of a powder and a liquid component. Depending on the requirements, the resin can be mixed at ratios between 1:1 and 3:1 (powder: liquid). At a standard mixing ratio of 2:1, the resin can be poured for approx. 2 minutes and remains subsequently kneadable for about 30 seconds. The curing time is approx. 5 minutes. Available in black and yellow PROPERTIES AND APPLICATION Impression accuracy 1 μm Excellent dimensional stability and easy to remove Variable mixing ratio is possible The stabilization of the separating process Impressions can be examined with feeler gauges or non-contact measuring methods.