Ilford HP

Infobox Photographic film
name = HP5 plus
maker = Ilford Photo


speed = 400/27°
push = 3200/36°
format = 35mm, 120, sheets, disposable camera
type = p
process = Gelatin-silver
bw = yes
start = 1989
app = General Infobox Photographic film
name = HP5
speed = 400/27°
start = 1976
stop = 1989
replace = HP5 plusInfobox Photographic film
name = HP4
speed = 400/27°
start = 1965
stop = 1989
replace = HP5 Infobox Photographic film
name = HPS
speed = 400/27°, 800/30° (1960)
grain = coarse
start = 1954
stop = 1998
replace = Delta 3200Infobox Photographic film
name = HP3
speed = 125/22°, 200/24° (1952-53), 400/27° (1960)
start = 1941
stop = 1969
replace = HP4Infobox Photographic film
name = HP2
speed = 200/24°
start = 1939
replace = HP3Infobox Photographic film
name = HP
speed = 160/23°
start = 1935
stop = 1939
replace = HP2

HP is a cubic-grain black-and-white film from Ilford Photo with a long history. [cite web | title=Ilford History and Chronology | url=http://www.photomemorabilia.co.uk/Ilford/Chronology.html | accessdate = 2008-07-27] It originated as "Hypersensitive Panchromatic" plates in 1931. Since then it progressed through a number of versions, with HP5 plus (HP5+ for short) being the latest. The main competitor of Ilford HP5 Plus is Kodak Tri-X 400.

HP3 went through two speed changes in its history, but only one actual change to the emulsion. In 1960 the 200 ASA emulsion was relabelled to 400 ASA with no change to the product. The 200 ASA speed included an exposure safety margin, but with improvements in light meters this was deemed unnecessary. Thus the speed was revised up to 400 ASA.

On September 23 2005 Ilford reintroduced their black-and-white single-use camera which includes 27 exposures of HP5 plus film. [cite press release
title = BLACK AND WHITE MADE EASY
publisher = Ilford Photo
date = 2005-09-23
url = http://www.ilfordphoto.com/pressroom/article.asp?n=14
accessdate = 2007-03-20]

References

External links

* [http://www.ilfordphoto.com/products/product.asp?n=7 Ilford HP5 plus]