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Shop | Optical

GLOW in the DARK Self-Adhesive paper.

This paper is coated with a phosphorescent material which glows in the dark after exposure to light. You can cut out any shape you require such as direction arrows, faces, stars and comets, etc. and stick it on. A4 sheet  
 Ref: CDT0245 | Price: £7.99 |

Thermocolour film changes colour with heat

Self-adhesive plastic film coated with a "liquid crystal" thermochromic ink. This film changes colour from black through a range of colours to bright blue as the temperature rises above 27C. Can be used for temperature indicators/warning devices, body jewellery or displays. This pack contains 1 sheet 150mm x 150mm.  
 Ref: CDT0246 | Price: £7.50 |

Make a Display with Thermocolour film.

This pack contains a piece of our Thermocolour Film (CDT0246) 50 x 150mm, 1 metre of resistance wire and a project sheet showing how to make a simple display. The film changes colour from black to bright blue where it is heated by the wire. Make your name appear as if by magic!  
 Ref: CDT0247 | Price: £3.99 |

Mica Pieces (small)

10 grams of small clear off cuts of mica - approximately 0.05mm mm thick - Total surface area in pack approx. 600 cms2.
Used for temperature- resistant inspection windows, protective ‘glass’ covers, scientific instrument making generally.  

 Ref: CDT0363 | Price: £3.90 |


This plastic sheet is less than 1mm thick but is engraved so that it looks as though it is much thicker. Put an object on the sheet and it appears to sink below the surface. You won't believe your eyes. Contains one A4 sheet  
 Ref: CDT0249 | Price: £4.99 |


Sun Filter film. This high-quality film is designed to reduce the light intensity by 100,000 times so you can observe the sun directly. High density coatings on both sides of the foil ensures a highly uniform filtering, whilst neutralizing the effect of occasional microscopic holes in the coating. The image of the sun is extremely contrasty and almost neutral colour.
Instructions to make a sun-filter for your telescope or binoculars included.
Size: 20 x 29 cm. Made for the Baader Planetarium in Germany

Warning: NEVER look at the Sun without using a suitable filter. Your eyes could be permanently damaged. 

 Ref: OPF0007 | Price: £18.00 |


Turn your spectacles into powerful magnifiers when you clip on these 3x magnifying lenses. Perfect for enlarging the print of telephone directories, train timetables, computer printouts and all small printed matter. Ideal for reading and writing at home and at work. Simply clip on to the frame ofyour glasses - flip down when needed - up when not. Fits all specs. 
 Ref: GL007 | Price: £7.99 |

ALUMINIUM LOUPE. 3x5 magnification

ALUMINIUM LOUPE. 3x5 magnification. Very light weight 
 Ref: TL9050 | Price: £2.50 |

10x Magnification Loupe

10x Magnification Loupe. Black plastic eyeglass with 10 X Magnification. 
 Ref: TL9051 | Price: £3.50 |

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