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A chemical indicator made from the root of Alkanna tinctoria.



(Alkanna), a genus of perennial, mostly rough-haired herbs of the Boraginaceae family. The blossoms are in spiral racemes. There are 40 species, found primarily in the Mediterranean area, Syria, Iraq, and Iran. The roots of the Alkanna tinctoria contain a brown-violet dyeing substance that reacts with alkalies and ammonia. The alcoholic extract from alkanet roots is used in microscopic doses as a reagent with oils and fats; it is also sometimes used to color wines, food products, wool, and silk.

References in periodicals archive ?
I applied two coats of Purdey's alkanet root oil and four of linseed oil to the Westley.
The varnish blend I have is hard and really made for the alkanet.
As a side note, I mention in the article about alkanet being a red oil The reason is because alkanet in its pure state is red but if it's mixed with linseed oil it is actually purple.
Cationization of cotton with quaternary ammonium compound (both pre-treatment and post-treatment) and post-finishing with soft polyurethane emulsion has enhanced the fastness properties, tensile strength as well as relative colour strength (K/S) , whereas, reactive UV absorber based on oxalanilide and heterocyclic compound as UV absorber greatly increased the light fastness of alkanet dyed cotton.
The roots of Alkanet were acquired from Pride International, Karachi.
Colour characteristiccs of dyed fabrics were measured to check the effect of various dyeing auxiliaries on colour fastness properties fabric dyed with Alkanet root extract.
The company is the prominent manufacturer exporter and supplier of Afghan Dry Fruits such as Pine Nuts Kernal Pine Nuts Inshell Raw as well as Roasted Pistachio Mazari Kernel (Peshawri) Dry Figs Green Raisins Yellow Raisins Alkanet Roots Licorice Roots (Malethi) Afghan Almonds and many more.
Anchusa, the alkanet, is not widely grown in the north of England because of its preference for drier soils, particularly in winter.
More searching about alkanet led down the herbal highway.
Alkanet has a long history, having first arrived on the scene in Egypt in the latter half of that ancient civilization's 3,000-year period as a world power.
16mL/min, and the total content of alkanets and alkenes is the highest in the liquid products produced at 0.
From the total content of alkanets and alkenes and the LHSV and economic benefits, the technique at 0.