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Prusament PLA Anniversary LE 2021 970g (Blend)

Over the last three years, we received MANY requests to produce a rainbow filament. However, we found it rather difficult to produce it in large quantities and up to our standards. We can do a smaller series, though. So here it is: the PLA Anniversary 2021! We made 500 spools (each one of them will have a laser-engraved number). This is a very limited run, we don’t plan to produce more of these any time soon. Every spool will be completely different, so even your 3D prints will be totally different and unique.

Orders are limited to 1 spool per order!

Prusament PLA Anniversary LE 2021 has sold out in just 8 hours and the sale has officially ended.

What can you expect?

Manufactured In-House By Josef Prusa

We were not satisfied with the quality of filaments on the market. So we decided to make our own! Prusa Research is the only 3D printer manufacturer with its own filament production.

Premium-Grade Materials And Thorough Testing

The whole manufacturing process is closely monitored and tested – string diameter, color consistency, and mechanical properties – to make sure that every spool is perfect.

± 0.02 mm Manufacturing Guaranteed Precision

We believe the industry standard of 0.05 mm isn’t sufficient for perfect 3D printing. Instead, we guarantee ±0.02mm precision (± 0,03 for blends) and highly-consistent colors in our filaments.

High Quality You Can Check Yourself

We are the only manufacturer that gives the option to inspect parameters of every filament spool. Scan a QR code on the spool to see all details online (check the sample spool).

Check out the official announcement video!

Read more about Prusament in the article at or at!

About PLA

PLA melts at a relatively low temperature of about 175 degrees Celsius. Unlike so-called thermoset materials, PLA can be heated past its melting point multiple times with very little degradation. It’s a hard material, but that also means it’s somewhat brittle, and once it breaks, it likes to shatter. Only this material is proven for 50 microns layer height.

However, PLA is not a perfect material and, just like every other plastic, has some disadvantages. The low melting temperature also means low-temperature resistance. Parts start to lose mechanical strength at temperatures over 60 °C.

The combination of being low in UV and temperature resistance means that it’s not ideal for outdoor use. Also, PLA is only soluble in chemicals like chloroform or hot benzene. So when connecting multiple pieces, you’re better off using just glue.

Even though PLA is on its own food safe, we do not recommend repeatedly drinking or eating from your 3D prints. Because of the small fractures on the print surface, bacteria can build up in there over time. You can prevent this by applying a food-safe coating. When post-processing PLA, it’s better to use wet sanding. Without water, you'll quickly start heating the plastic by friction, which will cause it to soften and make it hard to keep sanding.

Compare this material in our filament guide

Read more about:

Prusament PLA

Printing Setup


215 °C 


50-60 °C 

Basic Attributes

Easy to print


Can print tiny parts

Low temperature resistance

Can print huge objects

Difficult post-processing

Hard and tough

Low warping


This PLA is made in-house by Prusa Research.

1.75 mm filament is manufactured with precision of ± 0.02 mm (±0.03 for blends)

Before printing, make sure the surface of heatbed is clean as described in 3D Printing Handbook.

Technical Data Sheet

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Safety Data Sheet

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1 review
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Collinson Matt
Collinson Mattlast year

The spool I recieved (168) Was effectivly shades of brown with a hint of green and yellow. Not anything like the pictures at all. Very earth toned, But technically rainbow..

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