Responsible Chemist
Technical articles
Specialized content
Since 1972
Over 50 years of experience
Responsible Chemist at Boreto & Cardoso, an industrial chemicals distributor founded in 1972. He is in charge of the technical documentation of the products, such as Certificates of Analysis and Safety Data Sheets, and of the technical review of the blog articles.
68 articles
LinkedIn profileAuthor: Walmir Rezende • 10/16/2025
Inadequate traceability and incomplete documentation are frequent causes of citations at electroplating shops. This guide presents a complete system for staying legally compliant and making audits easier.
Read MoreWalmir Rezende • 10/16/2025
The analytical grade purity of the copper, nickel, zinc and potassium cyanide salts used in electrodeposition determines the uniformity, adhesion and brightness of the electroplated coating.
Read MoreWalmir Rezende • 10/15/2025
A minimum purity specification of 98% for electroplating acids is no exaggeration: it is the requirement that separates professional processes from problem operations.
Read MoreWalmir Rezende • 10/14/2025
Switching chemical input suppliers 100% at once is a common mistake in electroplating shops. Learn the Boreto & Cardoso 3-phase protocol for safe transitions.
Read MoreWalmir Rezende • 10/13/2025
The quality of chemical inputs directly determines the success of the whole electroplating process. A complete guide with 13 essential products, professional technical criteria and a supplier validation protocol.
Read MoreWalmir Rezende • 10/12/2025
Why lot-specific COAs, up-to-date SDSs, full traceability and ISO 9001:2015 certified suppliers are mandatory in professional jewelry electroplating, and how to prepare for audits.
Read MoreWalmir Rezende • 10/11/2025
Why certified analytical grade (P.A.) hydrochloric, nitric and sulfuric acids matter for surface preparation in jewelry electroplating: purity, specifications, traceability and good practices.
Read MoreWalmir Rezende • 10/11/2025
From pickling to finishing, discover the complete Boreto & Cardoso portfolio of chemical inputs for electroplating jewelry, fashion jewelry and costume jewelry, with full traceability.
Read MoreWalmir Rezende • 10/10/2025
Effective equipment sanitation prevents cross-contamination and keeps preservatives working in meat products by removing biofilms and residues.
Read MoreWalmir Rezende • 10/09/2025
Relying on alkaline cleaning alone, or acid cleaning alone, in a meatpacking plant CIP looks simpler, but it leaves residues behind and leads to biofilms and corrosion.
Read MoreWalmir Rezende • 10/08/2025
Production managers often ask: sodium hypochlorite or hydrogen peroxide? Both are sanitizers approved by ANVISA for the food industry, but they differ in mechanism, spectrum and application.
Read MoreWalmir Rezende • 10/07/2025
CIP (Clean-in-Place) protocols are essential for food safety in meatpacking and dairy plants. Yet seemingly minor operational mistakes can lead to contamination, biofilms, failed audits and equipment corrosion.
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