Name/Title
Booklet of universal pH indicator paper, pH 1–10, НПО «Биохимреактив»Entry/Object ID
2025.1.427Description
Small folded booklet of printed paper card, containing a block of indicator paper strips and a printed color-comparison scale.
Front cover: рН in a black panel at upper left, БУМАГА across the top in spaced capitals, then УНИВЕРСАЛЬНАЯ in reversed-out letters on a magenta band with ИНДИКАТОРНАЯ beneath it, 1-10 in a black panel at lower left, and two lines of magenta text. The РЕАХИМ wordmark and roundel logo sit at upper right.
Back cover: manufacturer's name and production unit at top; a boxed instruction paragraph within a magenta frame; batch and date stamps at lower left, applied by hand-stamp in black ink; catalog number and technical-specification number at lower right; 75 полосок set vertically at the right edge. Two black rectangular panels at the right, echoing the front.
Interior: the left leaf carries the color-comparison scale — five printed color patches in a graded sequence from crimson through orange to yellow, labelled pH 1,0 to pH 5,0. ⚠️ The scale visible runs only to pH 5,0; the remainder of the 1–10 range is not visible in this image and must be on a further leaf or the facing side. The right leaf holds the remaining stack of indicator paper strips, retained under a folded flap, with a narrow retaining tongue at the outer edge.Use
Belonged to Leopoldo Arús Gálvez, who used to measure the PhD of the distillate he made from wine.Context
A standard Soviet laboratory consumable.Collection
The Cabrera Arús family collection, Leopoldo Arús Gálvez collectionMade/Created
Manufacturer
НПО «Биохимреактив», Производство № 1Date made
3/1981Time Period
1980sPlace
City
OlaineLocation
LatviaCountry
U.S.S.R.Region
Eastern EuropeContinent
EuropeNotes
Trade association / brand: РЕАХИМ — mark on the front cover. ⚠️ The Soviet-era corporate identity behind this mark is not established. The modern АО РЕАХИМ states it was founded in December 1993 on the basis of the former Всесоюзное объединение «Союзреактив» of the USSR Ministry of the Chemical Industry. That establishes the lineage of the present-day company, not what РЕАХИМ denoted in 1981.Inscription/Signature/Marks
Transcription
All Russian; verbatim with translation.
Front cover:
рН — pH
БУМАГА — paper
УНИВЕРСАЛЬНАЯ — universal
ИНДИКАТОРНАЯ — indicator
1-10 — the pH range covered
Срок годности 5 лет. — Shelf life 5 years.
БЕРЕЧЬ ОТ СЫРОСТИ — Protect from damp
РЕАХИМ — Reakhim; with roundel logo
Back cover:
НПО „Биохимреактив" — NPO "Biokhimreaktiv"
Производство № 1 — Production Unit No. 1
Способ определения рН — Method of determining pH
Полоску индикаторной бумаги погрузить в испытуемую жидкость. Извлечь полоску и немедленно сравнить полученную окраску со шкалой. — Immerse a strip of indicator paper in the liquid under test. Remove the strip and immediately compare the resulting color with the scale.
ПАРТИЯ 3 — Batch 3 (hand-stamped)
ДАТА 3.81 — Date 3.81, i.e. March 1981 (hand-stamped)
НОМ. № 340018 — Catalog no. 340018
ТУ 6-09-1181-76 — Technical Specification (Технические условия) 6-09-1181-76
75 полосок — 75 strips
Interior:
pH 1,0 pH 2,0 pH 3,0 pH 4,0 pH 5,0 — scale labels, using the comma decimal separatorParts
Printed cover/booklet (1) + Indicator paper strips — ⚠️ count required; stated quantity 75Materials
Material
PaperMaterial Notes
Printed paper card, offset or letterpress in magenta and black. Indicator strips: paper impregnated with pH-sensitive dyes. ⚠️ Specific indicator compounds not stated on the packaging and not identified.Relationships
Related Person or Organization
Person or Organization
Leopoldo Arús GálvezRelated Places
Place
City
HavanaCountry
CubaRegion
Caribbean, Central AmericaPlace
City
OlaineLocation
LatviaCountry
U.S.S.R.Region
Eastern EuropeContinent
EuropeResearch Notes
Notes
Researched 2026-08-07 in Russian, per the standing instruction. Sources: dissercat.com (dissertation on processing of microbial biomass, referencing the Biochemical Reagents plant at Olaine, Latvian SSR); АО РЕАХИМ corporate pages (reachem.ru and mirrors) on the Союзреактив lineage.Created By
María A. Cabrera ArúsCreate Date
September 8, 2026Updated By
María A. Cabrera ArúsUpdate Date
September 8, 2026
