diff --git a/php/inc_fx_bib_production.php b/php/inc_fx_bib_production.php
index 38ad704..75f7de1 100644
--- a/php/inc_fx_bib_production.php
+++ b/php/inc_fx_bib_production.php
@@ -395,6 +395,8 @@ function fxBibProductionBuildSupplierXml($strXml, array $tabSnapshot, array $tab
         $objSheetData->removeChild($objSheetData->firstChild);
     }
 
+    // MSIN-4469 — Convention imprimeur : cellules bleues = imprimées sur le dossard.
+    // Colonne A (numéro) = bleu ; colonne B (épreuve) = neutre (info, non imprimée).
     $objHeader = fxBibProductionXmlCloneRow($objHeaderTemplate, 1);
     $strHeaderStyleA = (string)(fxBibProductionXmlFindCell($objHeader, 'A')->getAttribute('s'));
     $strHeaderStyleB = (string)(fxBibProductionXmlFindCell($objHeader, 'B')->getAttribute('s'));
diff --git a/php/templates/MSIN-4469-commande-dossards.xlsx b/php/templates/MSIN-4469-commande-dossards.xlsx
index 766f88e..efd4d0f 100644
Binary files a/php/templates/MSIN-4469-commande-dossards.xlsx and b/php/templates/MSIN-4469-commande-dossards.xlsx differ