{"product_id":"antique-brown-m38-immersion-or-brush-on","title":"Antique Brown® M38 Immersion or Brush-On","description":"\u003cp\u003e\u003c\/p\u003e\u003ch2\u003eANTIQUE BROWN M38 Browning Solution\u003c\/h2\u003e\r\n\u003cp\u003eOperating Instructions\u003c\/p\u003e\r\n\u003ch1\u003ePRODUCT DESCRIPTION\u003c\/h1\u003e\r\n\u003cp\u003eANTIQUE BROWN M38 browning solution operates at room temperature to form attractive brown coatings on brass, bronze \u0026amp; copper surfaces – either solid or electroplated. This product is formulated to allow the user to generate repeatable pleasing color tones ranging from golden to chocolate brown, including US10B and oil-rubbed bronze finishes. The M38 can be mixed with water to make up an immersion bath for bulk loads of parts. Or, it can be used undiluted as a brush-on browning solution for large surfaces.\u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003ch1\u003eOPERATING CONDITIONS\u003c\/h1\u003e\r\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eImmersion Bath Make-Up Concentration    25% by volume for medium-dark brown finishes\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e                                                                       15-20% by volume for lighter brown shades.\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eEquipment Construction                               Acid-proof tank: plastic or PVC-lined steel.\u003c\/li\u003e\r\n\u003cli\u003eVentilation                                                    None required. No fumes.\u003c\/li\u003e\r\n\u003cli\u003eFiltration\/Recirculation                                 Desirable for production-scale tanks.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e                                                                    Use 50-100 micron polypropylene filter element.\u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003ch1\u003ePARTS PROCESSING GUIDELINES\u003c\/h1\u003e\r\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\r\n\u003col\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eCLEAN \u003c\/strong\u003eand degrease the parts for five minutes in SAFE SCRUB M Multi-Metal liquid cleaner, mixed at 10-20% by volume; 100-140° If parts are electroplated, apply a minimum plating thickness of 0.0002”.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eRINSE \u003c\/strong\u003ein clean water tank for 30 seconds, to remove cleaner\/plating\u003c\/li\u003e\r\n\u003cli\u003e(Optional) \u003cstrong\u003eREMOVE TARNISH \u003c\/strong\u003eand neutralize residual plating cyanide by immersing parts in a solution of OXYPRIME POWDER, mixed at 1 lb\/gal for 1-3 minutes. Or use 10% sulfuric acid for 1-2 minutes. \u003cstrong\u003eRINSE \u003c\/strong\u003ein clean water for 20 seconds.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eAPPLY M38 FINISH \u003c\/strong\u003eby immersing parts in ANTIQUE BROWNÒM38 solution for 1-4 minutes, or as long as necessary to produce the desired color. Agitate parts gently to assure solution contact with all surfaces.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eRINSE \u003c\/strong\u003ein clean water tank for 20 seconds to stop the\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eDRY \u003c\/strong\u003ethe parts and \u003cstrong\u003eHIGHLIGHT \u003c\/strong\u003ethe finish, if desired, with an abrasive or polishing wheel or in a vibratory finisher. \u003cstrong\u003eAPPLY PROTECTIVE TOPCOAT\u003c\/strong\u003e, such as clear lacquer, wax or Note: the topcoat will enhance and darken the color of the finish as it is absorbed. The final color should be judged only after the topcoat is applied.\u003c\/li\u003e\r\n\u003c\/ol\u003e\r\n\u003ch1\u003eBATH MAINTENANCE\u003c\/h1\u003e\r\n\u003cp\u003eThe M38 bath can be operated as a semi-permanent bath in the process line and is controlled by total acid titration, or by using the CCK Color Change Test Kit (available from Birchwood Technologies). Other methods, such as Atomic Absorption, may also be used. Maintain the bath strength at 80-120% of original make-up. Keep tank covered when not in use to minimize contamination.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eBefore Using This Product – \u003c\/em\u003e\u003c\/strong\u003e\u003cstrong\u003ePlease Read, Understand and Follow all the Precautions shown on the Product Label and on the Safety Data Sheet.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Birchwood Technologies","offers":[{"title":"8oz","offer_id":48016406446395,"sku":"74M38","price":24.0,"currency_code":"USD","in_stock":true},{"title":"32oz","offer_id":48016406479163,"sku":"74M3832","price":55.0,"currency_code":"USD","in_stock":false},{"title":"Gallon","offer_id":48016406511931,"sku":"750150","price":185.0,"currency_code":"USD","in_stock":true},{"title":"5 Gallon","offer_id":48016406544699,"sku":"74M385G","price":560.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/7539\/6411\/files\/Antique-Brown-M38_1gal.jpg?v=1743102250","url":"https:\/\/maacaffestore.com\/products\/antique-brown-m38-immersion-or-brush-on","provider":"The Compleat Sculptor, Inc","version":"1.0","type":"link"}