Mirror polishing frame by unknown

Mirror polishing frame


Fine art poster

More products…
  • Amazing giclée print quality
  • 240gsm thick fine art print paper
  • 100+ year colour guarantee
  • Dimensions:
    • by cm including border ( by in)
    • by cm excluding border ( by in)

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Mirror polishing frame

This is a polishing frame, a ratchet for polishing mirrors up to 7inches diameter. It is a component of one of William Herschel's smaller polishing machines. When the Herschels were polishing telescope mirrors they fixed them in a special frame to ensure an even finish. The mirrors were made of a metal alloy (speculum, an alloy of copper and tin) which tarnished fairly easily, so they had to be re-polished at intervals.

William Herschel developed machines for polishing mirrors while building his 40ft telescope when the mirrors he was making became to large for the work to be done by hand. After 1789 when the 40ft was completed he started to apply the same principles to building polishing machines for smaller mirrors.

  • Image reference: F3351

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Our prints

We use a 240gsm fine art paper and premium branded inks to create the perfect reproduction.

Our expertise and use of high-quality materials means that our print colours are independently verified to last between 100 and 200 years.

Read more about our fine art prints.

Manufactured in the UK

All products are printed in the UK, using the latest digital presses and a giclée printmaking process.

We only use premium branded inks, and colours are independently verified to last between 100 and 200 years.

Delivery & returns

We print everything to order so delivery times may vary but all unframed prints are despatched within 2-4 days via courier or recorded mail.

Due to the coronovirus pandemic and Brexit situation, current shipping times may be longer, particularly for destinations outside the UK.

Delivery to the UK is £5 for an unframed print of any size.

We will happily replace your order if everything isn’t 100% perfect.