Sheet of 20 x $3.00 'Supercool measurements' gummed stamps.
This stamp shows the crystal structure of a thin section of sea ice. It is photographed with cross polarised light so that each crystal is a different colour. The thin sections are cut from a cylindrical core, drilled from the sea ice. The section in this photo is cut vertically through the cylindrical core and is 9 cm long. It is 'columnar ice' which is the ice that forms when the ocean is at its freezing point.
Explore the work of New Zealand’s leading Antarctic sea ice scientists with the this Ross Dependency stamp issue. Click here to find out more.
| Date of issue: | 2 November 2022 |
|---|---|
| Number of stamps: | Four gummed stamps |
| Denominations: | $1.70, $3.00, $3.80 & $4.30 |
| Designed and illustrated by: | Chris Jones, Graphetti , Wellington, New Zealand |
| Printer and process: | Southern Colour Print, New Zealand by lithography |
| Number of colours: | Four process colours plus overgloss |
| Stamp size and format: | 30mm x 40mm (vertical) |
| Miniature sheet size and format: | 150mm x 90mm (horizontal) |
| Paper type: | Arconvert securpost premium gummed 110gsm |
| Number of stamps per sheet: | 20 |
| Perforation gauge: | 13.33 x 13.6 |
| Special blocks: | Plate/imprint blocks could be obtained by purchasing at least six stamps from a sheet. Barcode blocks were available in A and B formats. |
| Period of sale: | These stamps remained on sale until 1 November 2023. First day covers were only available until 1 January 2023. |