{"id":10470,"date":"2026-07-06T00:00:22","date_gmt":"2026-07-06T00:00:22","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=10470"},"modified":"2026-07-06T21:05:57","modified_gmt":"2026-07-06T21:05:57","slug":"184-vs-1173-vs-tpo-l","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/ko\/184-vs-1173-vs-tpo-l\/","title":{"rendered":"184 vs 1173 vs TPO-L: How to Choose for Clear UV Coatings, Light Colors, and Easier Mixing"},"content":{"rendered":"

\ube60\ub978 \ub2f5\ubcc0:<\/strong> \uad6c\ub9e4\uc790\ub4e4\uc774 \ube44\uad50\ud558\ub294 \uad11\uac1c\uc2dc\uc81c 184<\/a>, \ud3ec\ud1a0\uc774\ub2c8\uc2dc\uc5d0\uc774\ud130 1173<\/a>, \uadf8\ub9ac\uace0 \uad11\uac1c\uc2dc\uc81c TPO-L<\/a> usually get the clearest shortlist when they separate three decisions early: a routine clear or light-color UV benchmark<\/strong>, a liquid acrylic-varnish route with strong appearance control<\/strong>, \uadf8\ub9ac\uace0 a liquid low-yellowing route that can reach deeper cure or white-system pressure more comfortably<\/strong>. 184<\/strong> is usually the practical first benchmark when the job is a conventional low to medium film-build UV coating, ink, or adhesive. 1173<\/strong> moves up when the formulator wants a liquid photoinitiator with good compatibility<\/strong> and a stronger fit for acrylic UV-curable varnishes that need only slight yellowing. TPO-L<\/strong> becomes the sharper first screen when the project still wants liquid handling<\/strong> but also needs a wider absorption window, lower yellowing, and better confidence in white or deeper-curing systems<\/strong>.<\/p>\n

That is the commercially useful split. These three products are all relevant to lower-yellowing UV work, but they should not be treated as interchangeable.<\/p>\n

Why this comparison matters<\/h2>\n

Longchang already has live pages for 184 vs 1173 vs 819<\/a>, clear UV coatings<\/a>, and narrower application pages such as release coatings<\/a> \ubc0f soft touch coatings<\/a>. This page answers a different buyer question.<\/p>\n

Here the buyer is not choosing between a routine hydroxyketone benchmark and a deep-cure solid like 819. Instead, the real question is whether the project should stay with a conventional solid benchmark<\/strong>, move to a liquid acrylic-friendly slight-yellowing route<\/strong>, or go to a liquid phosphinate route for broader cure depth and white or light-pigmented pressure<\/strong>.<\/p>\n

That is a common decision in clear coatings, light-colored inks, overprint varnishes, and appearance-sensitive adhesive work where yellowing, handling, and cure depth all matter.<\/p>\n

Quick comparison table: 184 vs 1173 vs TPO-L<\/h2>\n\n\n\n\n\n\n\n
\uc81c\ud488<\/th>\n\ucd5c\uc801 \uccab \ubc88\uc9f8 \uc801\ud569<\/th>\n\uad6c\ub9e4\uc790\ub4e4\uc774 \uc65c \uadf8\uac83\uc744 \ud6c4\ubcf4\uc5d0 \uc62c\ub9ac\ub294\uac00<\/th>\n\uccab \ubc88\uc9f8 \uc635\uc158\uc774 \uc544\ub2d0 \ub54c<\/th>\n<\/tr>\n<\/thead>\n
184<\/a><\/td>\nRoutine low to medium-thickness clear coatings, lighter-color inks, and conventional UV systems<\/td>\nLongchang positions 184 around strong 365 nm relevance, fast curing in low to medium-thickness coatings, inks, and adhesives, with low-yellowing value in transparent, white, and lighter-color applications<\/td>\nWhen the project needs liquid handling, stronger acrylic-varnish workflow convenience, or deeper cure in white or more difficult films<\/td>\n<\/tr>\n
1173<\/a><\/td>\nLiquid acrylic UV-curable varnishes on paper, metal, and plastic where slight yellowing and compatibility matter<\/td>\nLongchang directly describes 1173 as a multifunctional liquid photoinitiator with good compatibility, easy blending with other photoinitiators and prepolymers, and special relevance for UV coatings that require only slight yellowing even after longer sunlight exposure<\/td>\nWhen the project is more pressured by white-system cure depth or broader absorption needs than by acrylic-varnish handling and appearance control<\/td>\n<\/tr>\n
TPO-L<\/a><\/td>\nLiquid low-yellowing route for white or light-pigmented systems, deeper cure, and broader UV-process flexibility<\/td>\nLongchang positions TPO-L as a liquid photoinitiator with low yellowing, low odor, a relatively wide absorption range, and direct suitability for curing white deep-layer systems while also covering coatings, inks, adhesives, and clear varnishes<\/td>\nWhen the job is a simple routine low-to-medium-build system that does not need broader cure depth or the TPO-L handling and white-system advantages<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

When 184 is the better fit<\/h2>\n

184 deserves the first sample slot when the formulator needs a practical conventional benchmark<\/strong> rather than a more specialized liquid route.<\/p>\n