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Alle zegels zijn gedrukt in rasterdiepdruk op Goebel resp. WIFAG druk-aan-de-rol persen. De perforatie voor de Goebels werd aangebracht met veltanding cq kamtanding 14 28/17,. op de WIFAG met kamtanding 11 22/15 resp. 11 1/2 : 11 23/15.
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Valor Facial取 Descripci(!oacutus)n Servicio Terrestre 1981-1982 $0.50 Facial取 Partes Automotrices $0.80 Fa ial取 Ganado Perf. 11 $0.80 Fa ial取 Ganado Perf. 11 $1.00 Fa ial取 Conductores El(!eacutus)ctricos 37.5 mm. $2.00 Fa ial取 Abul(!oacutus)n 37.1 mm. $3.00 Fa ial取 Zapatos Perf. 14 $5.00 Fa ial取 Minerales Perf. 14 $20.00Fa ial取 Hierro Forjado 36.5 mm. $20.00Fa ial取 Hierro Forjado 37.5 mm. $50.00Fa ial取 Plater(!iacutus)a Servicio A(!eacutus)reo 1981-1982 $1.600Fa ial取 Bicicletas $4.000Fa ial取 Miel $5.000Fa ial取 Veh(!iacutus)culos Automotores $50.00Fa ial取 Hilos de Algod(!oacutus)n |
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2p Abulon Alles vel: - in 1976 met breedte 37.1 29.108 vellen op papier 1 - in 1978 met breedte 37.1 43.502 vellen op papier 1 - in 1983 met breedte 36.5 42.852 vellen op papier 5 - in 1983 met breedte 37.1 9.048 vellen op papier 6 Allles kam: - in 1979 met breedte 37.1 27.390 vellen op papier 2 - in 1980 met breedte 37.1 143.000 vellen op papier 2 - in 1980 met breedte 37.1 12.000 vellen op papier 4 - in 1981 met breedte 37.1 216.000 vellen op papier 4 - in 1981 met breedte 37.1 95.000 vellen op papier 5 - in 1982 met breedte 36.5 59.500 vellen op papier 5 - in 1984 met breedte 35.9 602.108 vellen op papier 7 - in 1985 met breedte 35.9 784.600 vellen op papier 7 http://www.canson-infinity.com/en/faq/what-are-obas-and-their-effects OBA means 'optical brightening agent'. These chemicals are often added in the coating (see RC papers for instance) or even in some cases, in the base paper itself. They help provide a higher whiteness to the paper. The visible spectrum spans from 380 nm (close to UV) to 780 nm (close to IR) for the human eye. The OBA can absorb the electromagnetic radiation between 300 and 400 nm and re-emit the energy into the visible (blue) part of the spectrum, between 400 and 500 nm, which is called fluorescence. The cellulose-base paper will absorb a part of the visible light and tend to get a yellow shade. As the blue is the complementary color of the yellow, adding an OBA to the paper will therefore bring more whiteness to the paper. Caution: the OBA are unstable molecules and may turn yellow over time, which will lead to paper discoloration. |
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https://www.xrite.com/blog/textiles-optical-brightening-agents http://www.pulppapermill.com/dry-strength-additives/ http://www.pulppapermill.com/optical-brightening-agents-in-paper/ http://www.pulppapermill.com/what-is-bleaching-of-pulp/ |
100p con trama
- grey thin, screened in redb.c 5
- grey thin, green screen closed 5 7
- grey thick, screened in green
AND red 5 8 rough, 40 degr.
- grey thin, screened in green,
reddish in redd 8 rough, -10 degr.
- grey thick ? reddish in redd 8 rough,8 smooth
- grey thick ?, weakly screened in red 8 smooth
200p con trama
- grey think ?, weakly screened in red 8 smooth5
- grey thin, inverted;
green screen closedred 8 smooth7
- grey thick? green screen closedred 8 smooth8 rough, 40 degr.
- grey thin ? green screen closedred 8 smooth8 smooth
200p sin trama
- grey thin ? green screen closedred 8 smooth3
- grey thin ? green screen closedred 8 smooth10
300p con trama
- grey thin ? green screen closedred 8 smooth5
- grey thick, invertedscreen closedred 7
- grey thin , invertedscreen closedred 7 8 smooth
- grey thick, screened in bluelosedred 8 smooth
- grey thin, screened in blueelosedred 8 rough, 40 degr.
300p sin trama
- grey thin, screened in blueelosedred 8 rough,3
- grey thin, screened in blueelosedred 8 rough,10, 13?
400p con trama
- grey thick screened in blueelosedred 8 rough,7
- grey thick screened in blueelosedred 8 rough,8 smooth
- grey thin screened in blueelosedred 8 rough,8 smooth
- grey thin screenedd in blueelosedred 8 smooth
- grey thin screenedd in blueelosedred 8 smooth10
500p con trama
- grey thickscreenedd in blueelosedred 8 smooth7
- grey thickscreenedd in blueelosedred 8 smooth8 rough 40 degr.
- grey thinkscreenedd in blueelosedred 8 smooth8 smooth
- grey thickscreenedd in blueelosedred 8 smooth8 smooth
1000p con trama
- grey guilloche thin in blueelosedred 9
- grey guilloche thickin blueelosedred 9
- grey guilooche thinkin blueelosedred 10, 13?
- grey guilloche thickin blueelosedred 10, 13?
1000p sin trama
- redy guilloche thickin blueelosedred 10, 13? 10, 13?
- grey-redlloche thickin blueelosedred 10, 13? 10, 13?
- grey redlloche thickin blueelosedred 10, 13? 14
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