An oil-based inkjet ink is disclosed, that contains a pigment, a fatty acid ester-based solvent (A) having a viscosity of 5.0 mPa·s or lower and a boiling point of 300°C or higher but lower than 400°C, and a fatty acid ester-based solvent (B) having a viscosity of 10.0 mPa·s or higher and a boiling point of 400°C or higher.
The invention provides a foam control formulation in the form of a microemulsion, the formulation comprising: (a) from 5 to 70% w/w of primary surfactant, this surfactant having an HLB of from 1 to 12 and/or a cloud point of from 20 to 70° C.; (b) from 2 to 40% w/w of water-insoluble organic carrier liquid; and (c) water. Also provided is the use of this formulation to prevent and/or reduce foam in a fluid system, or as a processing aid to control foam production in a fluid system. The formulation may be used in an aqueous fluid system, such as an oilfield.
Disclosed is a solid soap preparation which can dissolve very quickly when it comes into contact with water and which enables exact dosing of a specific amount of soap. The soap preparation contains air bubbles and thus exhibits a certain degree of elasticity and plasticity.